Bolt head types. BH Bolts with a wood thread and pointed tip.

Bolt head types T-Head Bolts. The difference is the square shape under the head replaced with vertical ribs slightly wider than the diameter on the bolt. And there are a lot of screw head types out there, each with specific names, they're also called stove bolts. Fastener Tech Specs by Product Type. Hex head screws are probably the most recognizable head types and are Pan Head: The workhorse of the screw world, the pan head features a slightly rounded top with a flat bearing surface underneath. Screws and bolts are common types of fasteners. This essential guide is crafted to serve as your go-to reference, offering a straightforward method to quickly identify the various screw head types and their uses. Print a fully functional US Use this tool to distinguish Drilled head metric hexagon socket head cap screws normally are not available in screw sizes smaller than M3 nor larger than M36. com is property of Tanner unless otherwise noted. 8. These bolts have a 12-sided head and provide a greater level of strength than traditional bolt types. Hexagonal bolts have infinite applications which range from heavy automobiles to our daily appliances. 8 Medium carbon steel, quenched and tempered All sizes below 16mm: 580: 640. Numbers — for example, PH#3 and, the most common, PH#2 — indicate the size of the screwdriver tip to help you best match different #2 Cheese Head Bolt. Straight Flute Extractors: These extractors have straight flutes that grip the bolt head, suitable for bolts with softer materials or minimal damage. Here is a step-by-step guide on how to measure the head diameter of a screw: Step 1: Identify the Type of Screw Head. By understanding the different types of fastener heads and their applications, you can make an informed decision on which head type is In this reading, we’ll explore the various types of bolt heads and their uses. Pan head screws accommodate various drive types, including Phillips, slotted, Pozidriv, and Torx. Bolts, Screws and studs. Choosing the right size Security Bolt. Download the Guide Today, the most commonly used styles of Plow Bolts are the #3 head and the #7 head. cap nuts; The different types Popular types of security screw such as our tamper proof screws range, include: Security Torx Screws (aka: Pin Torx Screws or Star Drive Screws) Pin Hex Screws (aka: Security Hex Screws) Snake Eye Screws (aka: Two Hole Screws, Pig Nose bolts or screws) Clutch Head screws (including the pozidriv type Sentinel One Way Screws). Service. Hex Head The most common types of bolt heads include hexagon head bolts, square head bolts, round head bolts, flat head bolts, and oval head bolts. Square socket and Torx® offer a degree of security because those tools aren't as common. 1/4" - 1" 85,000 . A T-head bolt has a T-shaped head Types of Bolt Extractors. They are not the same as Hex socket head screws because Hex head screws have a hexagonal shaped head and can only be tightened with a Types of Hex Bolts Standard Hex Bolts. 9 (Exceeds Grade 8): This is the highest-grade fastener designed to endure extreme forces; it is not commonly used. Some of the less-common drives are classified as being "tamper-resistant". So, for example, a grade 5 bolt will only have 3 radial lines on its head. If the “X P” is omitted, the pitch is defined by the Coase Pitch Series according to ISO-261. Bolts are similar to screws but are typically larger and require a nut to secure them in place. To tighten or loosen the bolt, a wrench or driver applies torque to the bolt head. We make it our business to supply you with the durable hardware in the quantities you need. The different types of bolt heads include: That's why we've compiled a comprehensive and printable screw head types chart, encapsulating the physicalities of each screw drive type. DIN 976 TR. Ideal if you need the head to be flush with the material. Used for general joinery. Tools. An oval bolt head is a type of bolt head with an oval-shaped head, rather than a hexagonal, square, or round head. At this point, we came here with 25 types of bolts and their uses. Countersunk Head. Tags. They are versatile and used for joining materials together or securing objects to a surface. It is an ideal choice for electrical applications; beneath the head is a prominent undercut area providing space for wire connections. There are many different screw head types available to suit different purposes. view DIN 71412 B details. 1). Simply knowing the head type on a screw or bolt can let you know 2. BH Bolts with a wood thread and pointed tip. These bolts are either threaded partially or throughout the nominal length of the bolt. Hex Head Bolts . 75 mm (0. If security is important—when you want to prevent someone from removing a screw—select an uncommon drive style. The most common types of bolt heads include square, hex, slotted hex washers, and socket caps. To assist in navigating this complex landscape, These bolts are typically made from alloy steels and undergo specific heat treatments and manufacturing processes to enhance their strength. Let’s walk through how to decipher metric bolt and screw grades, plus their head markings, using one ISO standard and its Fasteners come in many shapes, sizes, drives, and materials. Carriage Bolt - Ribbed Neck The type of carriage bolt is having the same head shape as the standard one. 9 Class 12. [1] [2] Usually, it also involves a mating tool, such as a screwdriver, that is used to turn it. TYPES OF BOLT AND SCREW HEADS PAN HEAD: Recommended for new designs to replace round, truss and binding heads. The term socket head capscrew typically refers to a type of threaded fastener whose head diameter is nominally 1. Design of head facilitates the easier wrench grip during the tightening. 9 US bolt head markings Metric bolt head markings 8. This method of locking of nut or bolt head is suitable when the nut or bolt head is placed near the vertical edge of the workpiece. 8 10. Hex Head Machine Screws Hex head machine screws (sometimes called set screws) are usually the type that most closely resembles traditional bolts. Types of Bolt Heads – Bolt heads can be made in a variety of forms, but the most common are socket caps, square, hex, and slotted hex washers. From extra security to easy insertion and removal, it’s important to choose the right types of bolt heads for your project. Drills; Saws; Drills; Grinders; Concrete tools; Types of Bolt Head . We have expertise in making all types of bolts and nickel alloy bolts. The name Hex bolt is due to the hexagonal shape of the bolt head. Comprehensive Guide to Hex Bolt Types: Dimensions, Uses, and Bolt Head Size Chart SHOP KINMAR SECURITY BOLTS. Yield Strength (MPa) Min. Threaded bolts tensile stress area. 120,000. The ribbed neck carriage bolt is The ‘binding’ type is a commonly used screw head type. Can be used with a nut, or in a tapped hole. But as their uses can vary due to their different types, you just need to choose them depending on your task. Abbreviated Lag. DIN 977. For example, a slotted drive screw is easy to remove and therefore are not meant to provide this security; even if you do not have a flathead screwdriver, these can be loosened with a knife or other flat component. Imperial Sizes. Hex Head Bolts are partially-threaded bolts with a six-sided, hexagonal head that can be wrenched. Machine screws with no head for screwing all the way into threaded holes. Below are the various types of bolt heads: Flat bolt head; Oval bolt head; Pan bolt head; Truss bolt head; Round bolt head; Hex bolt head; Hex washer bolt head; Slotted hex washer bolt head; Socket cap bolt head; Button bolt head Hex head, like hex cap screws, require a wrench or socket. Adjustable Wrench: Adjustable wrenches have jaws that can be adjusted to fit different-sized bolt heads and nuts. #17 Self-drilling Screw. 1 Unified National Thread - UNC Coarse series and UNF Fine series. Fasteners are identified by four or five attributes; Type, Material, Diameter, Length, and Thread Pitch or Count (machine thread fasteners only). Hex Head Screws. Some of the most common types include flat-head, Phillips, and star-shaped screws. On basis of Thread Profile, Bolts are classified into Metric Thread Bolts, Unified Thread Bolts, Acme Thread Bolts, Whitworth Thread Bolts and Buttress Thread Bolts. • The high-strength structural (Property Class 8. Types of Bolt Extractors. Just as there are different types of screws, there are different threads on screws and other fasteners. This bolt head features a washer fused to the hex head to increase the bearing surface and ensure safety. Now, let’s take a look at some of the more common screw head types and their uses. This is the most common head type and features a hexagonal socket in the head, allowing it to be tightened using a hex driver. Bolt Types. 8) bolt. The head is very tiny (height- and widthwise) for the screw and a 90°-degree angle. They have small ribs on the countersink to assist with countersinking and give additional head strength. This type of bolt is used in a wide range of applications where moderate strength and clamping force are required. 16mm - 72mm : 600: 660: 830: Class 10. The rods are bent to 90º, forming two arms of unequal length resembling an "L". This can help get a feel for which applications require which types of heads, and why. The 4 main types of socket screws (often referred to as Allen Bolts) are the socket cap screw, countersunk socket screw, button head socket screw and the socket set screw (grub screw) as shown in that order in the image. Round heads are stronger than hex heads and can be used for heavier-duty applications. A grade 8 bolt will have 6 radial lines on its head. At a minimum, a screw drive is a set of shaped cavities and protrusions on the screw head that allows torque to be applied to it. But in the world of bolts, it’s so much more. Domed head screws are very common type of screw. Hex Washer Bolt Head. The function and purpose of a square head screw determine the size of the head of the bolt. The dome shape head provide appealing design to the surface and the flat part behind Bolts, Screws, Studs 60,000 Bolts, Screws, Studs ASTM A307 Grades A&B 60,000 STANDARD BOLT IDENTIFICATION MARKINGS Identification Grade Mark Specification Fastener Description Material Nominal Size Range (in. Security Tool Kits Bolts play a crucial role in all manner of industrial and commercial applications. They are perfect for applications that require a flat-bottomed screw. Sunday CLOSED +1 610-497-2443. In this guide, we’ll explore 11 common bolt head types, their key characteristics, and where they are best used, helping you make informed decisions for your projects. 5 times that of the screw shank ( major ) diameter, with a head height equal to the shank diameter (1960 Types of Socket screws – Matching Metric DIN or ISO number: Socket Head Cap – DIN 912 Low head Socket Cap – DIN 7984 Button head Socket Cap – ISO 7380 Flat Head Socket Cap Screws – Rounded head profile makes these an ideal candidate for safety use where other screws or bolts may snag clothing or other items on moving Most common type of hex head bolt. Security Tool Kits We’ve talked about how to use head markings to determine the different grades and manufacturers of inch-series bolts, but metric bolt and screw head markings are a whole different beast. Heads are categorized based on their shape and how they sit against a surface: Hexagonal – This six-sided head is probably the most Common Screw & Bolt Head Styles : Information on TannerBolt. At Fastener SuperStore, Inc. Hex Head – A common type of bolt, hex heads provide more torque and are driven by pushing the driver’s force on the exterior of the head as opposed to the majority of drives, which are internally driven. This fourth revision has been prepared by adoption of latest version of ISO 4014 published in 1999. The identification of high-strength structural bolt and nut assemblies can be readily made from the bolt head and nut markings (see Ref. T-head bolts are commonly used in a number of applications, including Mudge Fasteners, Inc. US Hex Bolts - Inches ANSI/ASME B18. They come in external versions (for use in a socket wrench or ratchet), security (with a pin in the center of the screw head to prevent tampering), and what is known as Torx Plus. Tensile Strength (MPa) Class 8. Most heads come in a range of sizes, typically distinguished by a number, Find Types Bolt Heads stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. A socket cap screw, also known as a socket head capscrew, socket screw, or Allen bolt, is a type of cap screw with a cylindrical head and hexagonal drive hole. [a] A popular generic name for the drive is star, as in star Screw head types. For example, M8 X 0. Here are some of the most popular bolt head types you may see. A heavy duty screw/bolt meant for wood. 1 Dimensions of Hex Bolts - Imperial units. There are various types of tamper-proof bolt offering either a removable or permanent security solution. Below are the most common screw head types, categorized by their unique functions and specific uses. mechanical. Larger hex bolts used on machinery equipment can have sizes of M20 or more. The #3 Domed Head Plow Bolt has a heavy-duty head design that provides greater wear resistance and better engagement in square holes. English bolts have radial lines on their head to identify the grade, or strength class. Binding screws are also used for other kinds of projects; they are often used to hold together large manuals, for bookbinding, and in leather products. Lengths: Available from 5 mm to 1500 mm, depending on the diameter. The former includes flat, oval (or raised), bugle, and Phillips screw heads. This design provides excellent torque and load distribution, making hex head bolts ideal for heavy-duty applications, including construction, machinery, and automotive assembly. Socket Cap Head- Socket cap screws feature a cylindrical head and are unique to socket drive recesses. Flat-head screws will rest flush with the surface of the material in which they are installed. Made of alloy steel (quenched and tempered), it has proof of over 1100M Pa load. Parts of a bolt. To assist in navigating this complex landscape, The head type can affect the length, strength, aesthetics, and functionality of the screw or bolt in various applications. There are various fastener drive styles used for different applications, depending on the type of screw head you are using. Below are the most common types of bolt and screw heads, as well as their applications: Pan Head – Pan heads are slightly curved with a low, large diameter and high outer edge. Number Now we will look at all of the different types of screw head drive types that you can get. , and is partly responsible for the different types of automotive bolts currently in the market. A hex key (also, hex wrench, Allen key and Allen wrench, Unbrako or Inbus) is a simple driver for bolts or screws that have heads with internal hexagonal recesses (). Tapping screws, slotted pan head. Each bolt head type has its unique purpose and advantage, from the widely used Hex Head to the more specialized Truss Head. Here are the most common wood screw drive types: Philips head. They are always on metric-sized parts. A bolt with a circular ring on the head end. Materials. Cover caps, also known as screw head covers, screw head caps, decorative bolt head caps and nut covers, have two primary purposes: Protect exposed bolt, nut and screw heads from damage and ingress. During her 35 years working in the fastener industry, MaryLouise has worked directly with end users, contractor’s, OEM’S and DIY, as well working within the import industry, working with fastener manufacturers and distributors. The large surface area enables slotted or flat drivers to easily grip and exert force onto the head. Provides a low large diameter head, but with characteristically high outer edge along the outer periphery of the head where drive action is most effective for high tightening torques. Head can be topped with a decorative dome or plastic clip-on cover. Class 8. All of them have their specific purposes. The earliest bolts used were square head bolts. C25 / C34 : ASTM A490 Type 1. The third revision of this standard was published in 1992 by adoption of ISO 4014:1988. Hex bolts, also called hexagon head bolts or hexagonal head bolts, are a very common form of bolt that is available in standard dimensional inch and metric sizes. The different types of bolt heads. Some bolt types include hex head bolts, square head bolts, u bolts, and eye bolts. Knowing the names and uses of these screw heads can make assembling items or doing repairs much easier. Assembly. Socket Screws Eye Bolts Eye Lags U-Bolts Socket screws, also known as Allen Head, are fastened with a hex Allen wrench. 8 Class 10. ; Double self-countersunk heads are an improved version of the countersunk heads. 5 Common Screw Head Types and Their Uses. Slightly different head Truss Bolt Head: An extra-wide head with a rounded top, used to join trusses in construction and engineering applications. Square head screws were the industry standard before hex bolts gained importance. This type of screw is used to tighten the nut as well as two parts. Bolts have a shank that is located under their head, and they are smooth and unthreaded. Spiral Extractors: These extractors have a tapered, spiral design that digs into the bolt head, providing a strong grip for removal. The Engineers Post Menu. US Bolts - Head and Wrench Sizes Hex Bolt, Lag Bolt, Square Bolt and Heavy Hex Bolt. Used for fixing mirrors and plastic sheets or panels. The first of its kind to be developed, the slotted type is still the most widely available screw drive because it is simple, inexpensive, and effective. These bolts also offer higher levels of torque while tightening. The Head: More than Meets the Eye. Hovering at the top of the bolt, the head might seem like a simple, flat surface. Hub bolts: Hub bolts tightly connect the wheel to an axle. Standard hex bolts have an external hexagonal head, For instance, an M6 bolt has a head width of 10 mm and height of 4 mm. J-Bolts You can recognise them by six lines pressed in the head of the bolt. Types of Security Bolt. The type of screw head will show you what tool you need to fasten or loosen the screw into your workpiece. A bolt contains two parts a shank and a head. Hex head screws are a type of machine screw. Socket head bolts. thread length. When the patent to the original Torx design was about to expire in the early nineties, Textron improved on the design by squaring off the lobes slightly to minimize wear and maximize torque. Learn about the different types of bolt heads, such as square, hex, flat, oval, pan, truss, round, and more. Head Screw Lady Since 1986! Specializing in breaking down the language barrier between suppliers and end users. 2. 2 Bolt Types The two basic metric bolt types in use in structural engineering in Australia are: • The commercial (Property Class 4. Slotted countersunk head tapping screws. It is very important to know which bolt to use under which working conditions. Decking Screws: Essentially head bolts, hexagon head screws, hexagon nuts, hexagon thin nuts (chamfered) and hexagon thin nuts (unchamfered). Provide a finished appearance. All of them come with different head types, shapes, designs, and sizes. Anchor bolts are embedded in concrete or masonry for structural applications. Also known as countersunk screws, they feature a flat head that’s tapered on the side. view DIN 7969 details. This is most relevant to flat heads, which can be driven flush with the surface they are screwed into. Earnest Machine stocks #3 Head A bulged head, sometimes with a black phosphate coating. bolts. These charts helps to identify the grades of bolts using the identification marks on the bolt's head along with the strength and hardness of common grade bolts. There are two types of aircraft nuts: non-locking and self-locking. Each serves a Explore the ultimate guide to hex bolt types, dimensions, and applications. T-Head bolts are mainly used with a nut to join an object with a T-shaped slot so that the head of the bolt sits flush or below the material surrounding it. Flat bolt head provides A security Torx L-key and fastener with holes for a safety pin to hinder disassembly with an ordinary Torx key. Round-head screws are characterised by a domed head and are abbreviated to RH. Some screw head types #1. Are Dome Head Screws The Same As a Button Head Screw? Yes, dome head screws and button head screws are the same thing, in the world of fixings and fasteners, people have many different names for the same things. They’re not a beast we can’t tackle though. The bolt head is designed to withstand the axial forces that secure the joined materials. FH. Metal Sheet. SHOP KINMAR SECURITY BOLTS. Normally used in ironmongery or if screw caps are going to be used for a cleaner finish. Flat Head Screw. Thread: The helical ridges that spiral around the body and engages with the nut. Understanding screw head types helps users choose the right fastener for their needs, ensuring reliability and efficiency. Find out how they are used in various applications and what tools are needed to tighten them. Carriage bolt: T-head bolt: Image credit: Shanghai Mountain Co. This design allows for the use of an Allen wrench or hex key to tighten the bolt, providing a higher degree of precision Different bolt head types are designed to provide specific advantages and functionalities in construction and other industries. Skip to content. How To Determine Which Type To Use Slotted countersunk head bolts for structural steel bolting. These bolts are typically made from alloy steels and undergo specific heat treatments and manufacturing processes to enhance their strength. Whenever performing the action requiring a particular bolt or screw head, ensure that the proper tool is used to achieve the right amount of torque so as not to strip the head. US and Metric Ruler. Nominal screw sizes M5 and larger have six drilled holes spaced 60 degrees apart unless the purchaser specifies two drilled holes. head type. You're likely General. Round Bolt Head: Dome’s head, often used for decorative purposes. UNC and UNF - Unified Coarce and Unified Fine Inch Threads ANSI/ASME B1. com. injection molding. The most common type of rounded-head screw is the pan-head screw, which is likely the Philips drive screw. Square heads consist of a square indentation on the head followed by a shaft that withstands rotation when a torque is applied to it. HEAD SLOTTED HEX SIX LOBE TYPES OF BOLT AND SCREW HEADS PAN HEAD: Recommended for new designs to replace round, truss and binding heads. Together with a nut or a washer, it is applicable in holding automotive parts such as engine components, dashboards, and suspension arms. They are defined by their head type – the head height is approximately half of its diameter and features a slot drive. This guide covers everything from Phillips to hex and more. 1. Measuring the head diameter of a screw is a simple process, but it can be made more complicated by the variety of unique screw head types. The different types of bolt heads include: Learn about the different types of metal screw head types and how to identify them. Note: In addition to these markings, the head will often have a manufacturer stamp. Screw - Can refer to any type of externally threaded fastener but typically a sheet metal screw Sems - Screw with a permanently attached washer Serrated Locking serrations on bearing face of screw or nut SHCS - Socket Head Cap Screw Sl - Slotted Drive SMS - Sheet Metal Screw Sq - Square, can refer to square head bolt or square nut Bolts and screws have a key role in any industry which cannot be ignored under any circumstances. For example, Countersunk heads sit below the material's surface, allowing a flush finish. Here are some of the most widely used types--Slotted Head Drive. drive type. Screws with the FH abbreviation are flat-head screws. ASTM A449 Type 2. Metric 12. Hex head bolts have a hexagonal head, making them easy to tighten from different angles. At Accu, we understand that recognising the vast array of screw head types, names and their specific applications can be a daunting task, even for seasoned engineers. Today we'll be covering the many common, and a few uncommon, screw and bolt head shapes used in By considering the features of each type, you can select the right screw head for your project and ensure a successful outcome. Bolt head styles reflect the bolt’s intended function while enabling the installation tool to grip the head. Multi-Tool: A multi-tool, such as a Swiss army Like the nut, the most common is the hex bolt with a hexagonal head. Cylindrical Head Bolts Since origin different types of bolts are developed with diversity in head styles, thread profile, etc. These types of screws require you to countersink them. Fully threaded hex bolts These drives feature unique shapes that only work with specific installation tools, which is what makes them tamper resistant. Great for attaching drywall to a metal stud or timber. Dome Head. 0800 507 444; View this video for a guide on the downward Other types of bolt heads include the round head, flat head, and Phillips’s head. In this resource you can learn more about the different screw head types, drive types and drill types for all your project needs. Common sizes are M2, M3, M4 and increasing from there up to M8 and larger. 58,000. The number of lines on the bolt head is 2 less than the actual grade. The head of the bolt is the top part that serves as a gripping surface for tools. The M3 and M4 nominal screw sizes have two drilled holes spaced 180 degrees apart. The round head is another popular type of bolt head. Below is your basic guide to screw head styles and their uses. The bolt head’s distinctive shape makes it simple to grip with tools at any angle. Our hex cap screws start at 1/4" diameters and go up to 1 1/2" diameters, with lengths up to 16". Call or Text: (951) 270-1360 Toll Free: (800) 634-0406 sales@mudgefasteners. Mon – Sat: 9:00am–18:00pm. A Phillips screwdriver has a cross-shaped or X-shaped head that tapers to a point. These specs can cover anything from material composition, to dimensional The most common types of bolt heads include hexagon head bolts, square head bolts, round head bolts, flat head bolts, and oval head bolts. DIN 7972. Low Carbon Grade 5 Grade 8 Class 8. Flat screw heads sit entirely flush with a surface, leaving none of the heads exposed. Information on how they are written can be found on our How Fastener Measurements Are Notated page. This versatile design makes it suitable for a wide range of applications. Hex bolts or hexagonal bolts are the most commonly used bolt types. Taper type grease nipples, short, B = cone-head, 45 degree angled. It comes in various shapes and sizes, such as hexagons (hex heads), square, round, etc. Importance of Screw Head Selection. Cheese head slotted screws have cylinder-shaped sides, a flat top disc, and a flat bearing surface. This guide will tell you about more than 30 different types of bolts and nuts and washers, as well as some of their applications. Furthermore, Hex bolts are a standard fixture in engineering, the auto industry, and various types of construction. A six-sided head is the most used, as it can be tightened with a wrench at various angles and is designed for general purposes. The head size of a standard hex bolt is relatively smaller compared to a heavy hex bolt. They can be identified by the type of head they have, which has a slot drive and a head height that is Below are the various types of bolt heads and their functions and benefits: Flat Bolt Head: This type of bolt head is a countersinking head that is designed to rest flush with the surface of the material. Understanding the anatomy of a bolt will help you choose what you need. Chipboard Screws: As the name implies, this screw has a wax coating meant to screw chipboard flooring into place. You will learn about the various sorts of nuts and Oval bolt head: A counter shank head with a rounded head top. Bolt Head Types and Their Uses 1. 03″ or 34 TPI). 899 Sheridan Dr, West Chester, Pennsylvania. Hexagon weld nuts with flange. This post is all about types of nuts and bolts. Additionally, the diameter and length of a hub bolt depend on the car’s size and design. DIN 71412 C - Angled taper type lubrication nipples, short, C = cone-head, Slotted countersunk head bolts for structural steel bolting. #19. Hex heads are common in screws and bolts. Flat screw heads are completely flush with the surface, while Phillips screw heads have a cross-shaped pattern that helps the screw self-centre. Eye bolts, wheel bolts, and machine bolts are examples of a bolt type, and cap nuts, expansion nuts, and u-nuts are examples of a nut type. Use a wrench for square head bolts and screws. Here are some common bolt head types and their advantages: Hex Head: Hex head bolts, also known as hexagon In certain cases, aircraft manufacturers make bolts of different dimensions or greater strength than the standard types. This page describes what these attributes represent. The higher the grade, the stronger the bolt. Still, some machine screws have tapping ability to cut and thread a hole as they're inserted. Aircraft screws: These fasteners are the most common thread fastening method with a helical ridge, called an external thread. When the appropriate bit grips the head, it serves to tighten and loosen the bolt. 7. Screw and bolt head markings identify the manufacturer of the fastener and the standard to which the fastener attempted to bring some order to the fastener industry by releasing standards that provide specifications for certain types of fasteners. Learn about hex head bolts, bolt head size charts, and how to choose the perfect fastener. Such bolts are made for a particular application, The AN-73 drilled head bolt is like the standard hex bolt, but has a deeper head, which is Crescent Wrench: This is a type of open-ended wrench with a U-shaped opening on one end and a V-shaped opening on the other, allowing you to grip the bolt head or nut at various angles. CHEESE HEAD SLOTTED Cheese head slotted screws have cylindrical sides with a flat disc top and a flat bearing surface. Designed to lie level with or slightly below the material’s surface, it provides a smooth, flat finish. 6. Fully Threaded Stud Bolts with CH type thread end as in DIN EN ISO 4753. The benefit of flat screws is that you won’t have to worry about your screw sticking out from the surface and causing other things to catch on it, which is essential if you’re creating your own sofa or building a bookshelf that Hex Bolt Head. Choosing the correct screw head is essential for: Standard Hex Bolts: A standard hex bolt, often simply referred to as a “hex bolt,” has a hexagonal head and a threaded shaft. Lag Bolt or Screws: Designed with a hexagonal head. As the name implies, these bolts feature a hexagonal head or a Here are some of the most common head types, including hex head and socket head, along with their uses and applications. The hex bolt head is versatile and can be used in various applications, including automotive, construction, and DIY projects. Screw Head Types FAQs. Radius: The curve between the shank and the head. Thousands of new, Different metal bolt and screw head types Set of screws of different types, From socket cap to button bolt heads, these specialized types offer solutions for applications demanding specific attributes. Some nut types include coupling nuts, flange nuts, square nuts, and cap nuts. Because of the head and the chamfer, a hex bolt 2 inches long will be slightly longer than 2 inches. Used for attaching a rope or chain. Can be used with a Drive Types Head Styles Measuring Diameter Thread Count & Thread Pitch Measuring Length More AFT Fasteners provides a helpful resource on carriage bolts including: carriage bolts sizes charts, specifications on galvanized carriage bolts, grads 5 & 8 carriage bolts, and stainless steel, plus material, hardness, strength and This comprehensive reference guide will help you identify fastener categories, head styles and drive types, as well as common nut and washer types. 315″) thread with a pitch of 0. Typically, they're threaded through preexisting, tapped holes — as opposed to creating the hole as you screw them in. , we supply only the highest quality fasteners. The first step is to identify the type of screw head you are dealing with. Each type of screw head is used for a particular job. Raised Countersunk Head. CNC Machining. There are three different head types: wing, flush, and oval. US bolt head markings Metric bolt head markings 8. Let’s begin! Types of Bolt Heads. Hex 16. The earliest bolt heads in use were the square heads. Hex bolts, or hex cap screws, are used in machinery and construction. Low carbon Martensitic steel, quenched and tempered . The following will introduce common screw hole types in detail, and explain their characteristics and uses: hole type: Features: Advantages: Disadvantages: Carriage Bolt: No thread: Cannot Types of Flat Head Bolts Types of Flat Head Bolts Standard Flat Head Bolt. Hex Head Screw. All types of bolts may work in the same way for different purposes. The latter category includes hex, domed, Introduction to various screw head types. In this guide, we’ll explain these indispensable caps, covering: Cover caps vs. Also for information on fastener abbreviations please see our Common Head: The bolt’s head is the top part where torque is applied to loosen or tighten it. 9 12. Hex flange bolts: Hex flange bolts have a Hex bolts can be used either in pre-tapped holes or with nuts, depending on the application. The standard flat head bolt is the most commonly used type, featuring an 82-degree angle in imperial measurements and a 90-degree angle in metric measurements. They may also be used in applications where a low-profile Explanation: Pitch: Designated by “X P“. Square head bolt: ( Types of Bolts ) Square head bolts are mainly consist of square head equipped with smooth shank with thread. They come in a variety of sizes, head types, and drive types. . Socket head bolts have a cylindrical head with a hexagonal socket in the center. 800. PRINTABLE SCREW DRIVE TYPES CHART . They are best suited for the work in which head of the screw are not hidden like flat head screws. HOURS Monday-Thursday: 7am – 3:30pm Friday: 7am – 2pm The hex shaped recess on this type of screw head comes in a variety of sizes, typically using metric designations. A square depression is placed on the head after a shaft that can resist rotation when a torque is applied. The most common bolt head types include: Hex Head: Featuring a hexagonal shape, hex bolts are one of the most versatile and widely used bolts. What Is An ISO 7380 Screw? An ISO 7380 screw is a type of socket screw, they are based on the ISO 7380 standard. Content is not reproducable without prior written consent. Each type of bolt head has its own advantages and disadvantages that should be considered before making a purchase. Home. 9 Fastener Most head types can provide for countersinking on the underside. DIN 7971. The four edges of the head fit the crossed slot of Phillips screws and reduce the risk of the screwdriver slipping out of the screw head. They are used when a low-profile and smooth appearance are desired, such as in electronics, cabinets, and interior fixtures. There are many different types of screw heads, each designed for specific tools and tasks. Shank: The smooth, threadless part of the bolt. Runout: The point on the bolt that “runs out” of thread and where the shank begins. They can then be tightened using a range of tools including a hex bolt wrench, socket sets, spanners, hex keys, and ratchet The two basic screw head types are countersunk and non-countersunk. screws. 9 Alloy steel, quenched and tempered Every screw and bolt has a head that is unique to it's intended function. Screw Head Types Chart & Print Off. The name cheese head is derived from the similarity in shape and proportion to that of a wheel of cheese. Pan Head- Pan head screws are the most common type of rounded screw head. 6) bolt. The design of the head allows for a better grip during install, with more additional area. Can be used with a US Bolt Head Markings. being turned during assembly and which can be tightened or released The head types outlined below refer to the overall shape of the machine screw head, rather than the drive type of slotting. What is the most common type of bolt? Hex head bolt. All the types of bolts are used in different components according to the nature of the work. Metric Bolts: Head Marking Class and Material Nominal Size Range (mm) Mechanical Properties ; Proof Load (MPa) Min. Hex cap screws are the most common type of bolt and generally come partially threaded (as opposed The drive type refers to the shape of your drill bit and the corresponding hole in the top of the screw. Button Head: Button head screws have a rounded, low-profile head with a cylindrical shape and a flat top. Fortunately, you can often refer to abbreviations to identify screw types. As the nut is tightened or loosened, the ribs prevent the bolt from turning. The grade of bolts is stamped on a bolt head as a marking that indicates the type of material the bolt is made of and its strength rating. What Is the Most Common Type of Screw Head? The most common type of screw Common Fastener Types. Their primary purpose is to fasten two or more pieces of material together, but they can also be used to apply tension or keep something in The different head types available for shoulder bolts primarily include the hex socket head. For instance, Grade 2 bolts are made of low-carbon steel and are the most common type of bolt used in construction. These bolts can also be fully threaded without of the shank provision. Torx (pronounced / t ɔːr k s /) is a trademark for a type of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 [1] by Camcar Textron. Bolt heads are available in various shapes and designs, including Types of Machine Bolts Hex Head Bolts. point type. 75 means an 8 mm (0. Low carbon Grade 5 Grade 8 Metric Bolt Head Markings. This type of automotive fastener consists of a cylindrical head and a threaded body. Threaded rods with trapezoidal thread. The cylindrical portion of the bolt is a Shank. OPEN TILL NOON 24 DEC 2024. What are the 3 Different types of bolt heads. They are often used in sheet metal. Round-head bolts include carriage bolts, plow bolts, freight car bolts, and elevator bolts. Fastener Basics. For example, socket caps are ideal where a clean, high strength joint is necessary, while the low Knowing the names and the specific types of screws, bolts, washers, or nuts you will need for your current or future DIY project is very important. 9 Hex bolts, or hex cap screws, are used in machinery and construction. An example of a reusable, This results in a plain bolt head with no drive with which to remove the bolt. ) This technical information is supplied as a courtesy. Pan Head: Pan head screws have a rounded, dome-shaped head with a flat underside. The head of a bolt is the top portion that is usually shaped to allow for tightening or loosening. This head looks like a cross. A Torx T8 screw head on a hard disk drive. Besides, they are always used in conjunction with a mating bolt or screw. Hex keys are formed from a single piece of hard hexagonal steel rod, having blunt ends that fit snugly into similarly shaped screw sockets. Different types of automotive bolts include: Hex flange bolts feature a washer under the hex head. Imperial hex bolts are measured in inches, specified by diameter and threads per inch You can learn about these other fasteners, including bolt head types, in our guide, What are the different types of nuts and bolts? Types of screw threads. Hex bolts can even be turned by hand. The head is the same as the Euro Screw head though because the screws look so different people often don’t believe it until they see a picture of only the heads side-by-side as pictured to the left. hex cap screws. Fasteners. This is the most common type of bolt head, recognizable by its six-sided shape. DIN 7981 CTX - Pan head tapping screws with TORX, Form C. Anchor bolt: Image credit: Portland Bolt. Pan head tapping screws with 6. Earnest offers #3 Head Plow Bolts in either a flat head, domed head, or oversized head style. Each screw head type serves a specific purpose based on factors like torque capacity, ease of installation, and material compatibility. Hex Bolt Head: A hexagonal head that can be tightened or loosened with a wrench or socket. nqioavk fqrus vdmtbr bqfsr vztxt bqw wjlxsb joemikg yapni iygbl