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Bolt sizes uk?
Principles and basic data. We have a range of U Bolts for a variety of pipework applications. Order today for free next-day delivery on orders over £60 ex VAT. BoltSizeIt has a simple but direct mission; to design and create useful products/tools that our clients can sell and use as a marketing tools to promote their business in a professional manner. Coach bolts are typically measured in metric threads using the international standard ISO metric thread size system. Chancellor of the Exchequer Jeremy Hunt went a small way to. The diameter specifies the shank and thread dimension. Complementing the bolt, the nut plays a pivotal role in creating a secure connection. When it comes to fastening two objects together, cap head bolts and cap head screws are two popular options. It is very helpful to know the decimal equivalent for a US screw size you have. They come with a plate, nuts and washers, in sizes from 4mm to 12mm. The width of the hexagon nuts across flats s is specified in ISO 898-2 Table A. Get a quote for Hex Anchor Bolts, Head Hex_Bolts and all kinds of Bolts or just call our sales team now. Hex Set Screws - BSF. A bolt torque chart provides valuable information regarding the amount of torque required. The larger the bolt, the more torque is needed to achieve the necessary clamping force. If you are measuring a countersunk screw make sure to measure the entire length. Countersunk bolts can be attached into a pre-tapped hole or via a nut as with a standard preloaded bolt. 47, specify the stud bolt diameter and the number of bolts required in a bolted assembly, based on the pressure class, flange type, and pipe size, and from the stud bolt chart below, you can determine the corresponding nut size. IMPERIAL SIZE (NO X INCH) METRIC SIZE (MM APPROX 3 4 x 3/40 x 20 3 We supply industrial nuts, bolts, washers and fixings. sales@leytonfastenersuk Call Us: 0151 355 8045 Opening Hours Monday - Thursday: 08:30 - 17:00 As mentioned, a set screw is. Premium men's and ladies leather belts handmade in England using genuine leather. So a bolt with a 2mm diameter is 2M. Anchor Bolts; Construction & Anchor. How to measure the size of British Whitworth Spanners and British Standard Wrenches and Sockets. The rest of the bike takes some that are non-commercial sizes like 45mm or 55mm and then there's a few special stripper type bolts. The basic dimensions are nominal dimensions of a metric thread profile without allowance and tolerances (The thread class defines that). AN3: AN4: AN5: AN6: AN7: AN8: Diam186 - 246 - 309 - 371 - 433 - 459 - GRIP +1/64-1/64: LENGTH + 1/32 - 1/64: GRIP +1/64-1/64: LENGTH + 1/32 - 1/64: GRIP +1/64-1/64: LENGTH. Please feel free to call us on +44 (01299) 272 955 for further information or advice on any of our bolt products. The most common system adhered to is the ISO Metric Screw Thread, where designations like M6x1 signify a M6 screw with major diameter of 6 mm and a pitch of 1 mm. The width of the hexagon nuts across flats s is specified in ISO 898-2 Table A. This is the diameter of the bolt. For fasteners where the head usually sits above the surface, the measurement is from directly under the head to the end of the fastener. We deliver the most complete and accurate global vehicle fitment database available. Whitworth wrenches are needed on your old Austin, Rolls Royce, Bentley, Jaguar, or other old British made automobile or. Flange thicknesses shown are the greater thickness for that rating. Here's an example metric bolt specification: M8-1 For example, a 1/4-inch by 3/4-inch bolt has a diameter of 1/4 inch and a length of 3/4 inch. Usually specified as M then a number x another number. Imperial and metric measurements included. Nominal Size or Basic Screw Dia. Google is one of the most popular and widely used search engines in the world. Gauge sizes range from 33mm, and lengths range from 12 to 120mm. Adjust the jaws of the bolt calliper until they are snug against the bolt. CHAPTER 5 MEMBERS IN COMPRESSION 1 Resistance of cross-section 5. Extended Leg "U' Bolts - with 4 Nuts Imperial B1 D. The second chart below is a US fraction to metric mm for the more c. This provides a certain amount of play in the holes, which compensates for small misalignment's in hole location or assembly, and aids in the shop and field entry of fasteners. The measurement of an inch nut or bolt will be listed as the thread size — a number between one and 12 or an inch increment followed by the threads per inch (TPI). Bolts come in several configurations for their application and specification variances. The vehicle must have 4 doors and a minimum of 6 seats (excluding the driver) Be in excellent working condition, with no cosmetic damage. Going stir crazy from sheltering in place? You are certainly not alone, but music could hold the key to making these strange times so much more tolerable. All dimensions in millimetres BS 3643 Part 1:2007ISO metric screw threads. Nuts and bolts can have very similar pitch sizes that aren't the same, so you must establish the correct pitch size for your fastener. Tension Control Bolts and the innovative Shear Wrench system are the lowest cost method for installing preloaded or High Strength Friction Grip (HSFG) bolts. Coach screws are heavy-duty screws with a square or hexagonal head and an externally threaded cylindrical shaft that tapers to a point at the tip. Including Standard, Grip, Non-grip and Extended Thread Size. The old method of how you used to measure the size of a spanner used to be; the spanner size was named after the fastener size. Imperial and metric measurements included. GIVE US A CALL - 01259 218 830. Our products are rated highly in the Fastener and Industrial markets. Get a quote for Hex Anchor Bolts, Head Hex_Bolts and all kinds of Bolts or just call our sales team now. Spanners come in various types, such as open-end, ring, combination, and. We stock hundreds of thousands of wheel nuts, wheel bolts, wheel spacers and all other alloy wheel accessories. From M3 to M12 up to 100mm long, our titanium bolt grade 5 are available in different head choice and lenght. This table shows how to determine the clearance hole size for a bolt. They are also known as lag screws or lag bolts. For example if you were using a ¼’’ fastener size on a ¼’’ thread, the spanner would be called a ¼’’ Wide spanner. With so many flower delivery services to choose from, it can be overwhelming to decide which on. Extended pattern U Bolts are available as standard in mild Steel Zinc Plate and A2 and A4 Stainless Steel. 18083 p at both crest and root. Among the most commonly used sizes in the UK, the M6, M8, and M10 bolts stand out. com The world's largest wheel fitment database. Metric screws are listed by the diameter of the screw thread in millimetres by the length of the screw (in millimetres). Below is a guide to what each size of bolt cutter can cut. If you’re based in the UK. Find standard metric dimensions and spanner sizes in a table at the end of the article. To do this, use a pitch gauge. It typically consists of a threaded rod or bar with a hook or expansion anchor at one end, and is inserted into a hole drilled into the concrete. to/2DbqzNnVisit our website - http://wwwcomInstagram - http://wwwcom/toolsin. Again, you find that bolts 1/2 and 9/16 have a head height of around 0. When it comes to women’s footwear, leather boots are a timeless and versatile option. 35 inches, with a minimum of 0. For fasteners measured in inches, take the nominal major diameter and the threads per inch. When it comes to assembling and tightening bolts, using a bolt torque chart is essential. Spanner (Wrench) size. U Bolt Dimensions range from M6 to M20 in terms of thread diameter. Below is a guide to what each size of bolt cutter can cut. Calculating diameter and length is a critical part of identifying screws and bolts. Find the perfect fit with our British belt company size guide. houses for rent in sarasota fl under dollar1500 But the size of a metric fastener is more accurately specified using diameter, pitch and length dimensions, in millimeters. For the sake of this article, we'll use an M12 thread to describe bolt size. One bolt or one nut per tyre is sufficient to effectively protect it from theft. Get picked up by a top-rated driver in minutes and enjoy a comfortable ride to wherever you're going; or skip the traffic entirely on one of our industry-leading scooters. Including Standard, Grip, Non-grip and Extended Thread Size. Good luck with your project! Mark Z. For example, a 10mm by 50mm bolt has a diameter of 10mm and a length of 50mm. The most common system adhered to is the ISO Metric Screw Thread, where designations like M6x1 signify a M6 screw with major diameter of 6 mm and a pitch of 1 mm. This naming convention of M sizes for screws enables engineers to swiftly identify and match threaded components, thereby facilitating streamlined procurement and assembly processes. All dimensions in millimetres BS 3643 Part 1:2007ISO metric screw threads. Aug 29, 2023 · As a result, it can be difficult to locate an accurate chart which covers a range of hex bolt types and sizes. And they were not bad at all. Please use our advanced vehicle selector find to all the available parts for your vehicle. Hex Bolts - Metric. Friday: 8:30 - 16:00 Size in inches. Bed bolts for headboards come in different sizes and lengths. Specification for selected limits of size. If you’re missing a nut or bolt or nut and bolt or faced with a bin at the store filled with various-sized nuts and bolts, there’s no need to scrap your project Measure the length of a bolt from the underside of the bolt head to the end of the shank, and to measure diameter, measure the widest part of the shank of the bolt The pilot hole required depends on the density of wood being used. A variation of BSP with a tapered rather than parallel thread, with the diameter increasing or decreasing along the length of the thread. But how do you find their UK number? Here’s a guide on how to get in touch with the train. The following table includes all the strength classes mentioned in the screw torque table, along with their corresponding tensile strength and yield strength Tensile Strength 3 3 x 100 = 300 N/mm². Pipe Nominal Bore from 20 NB to 80 NB. craigslist section 8 apartments rentals mn Learn how to measure diameter, length, thread length and spanner size of metric bolts. A taper male thread will mate with either a parallel or a taper female thread, but a taper female thread will only accept a taper male thread. The most common system adhered to is the ISO Metric Screw Thread, where designations like M6x1 signify a M6 screw with major diameter of 6 mm and a pitch of 1 mm. Soft and medium-hard materials of up to Brinell 300. AN BOLT DIMENSIONS: AN No. For example, a 10mm by 50mm bolt has a diameter of 10mm and a length of 50mm. If the diameter is less than 1/4 inch, the diameter will be listed as a number between zero and 12; the larger the number, the closer it is to 1/4 inch. He also collected bolts from all over England, noting which sizes had shown to be most useful, and the results of various thread forms. Available in a range of sizes from M2 to M42 and din 933. Order today for free next-day delivery on orders over £60 ex VAT. Ba Imperial, Metric, Small Scale Hex Bolts, Ba Nuts, Washers, Studs, Threaded bar, Nylocks, Small taps & Dies, Half Nuts,small grubscrews Take a look at the different AF spanner sizes that should be used with UNC and UNF thread imperial bolts, along with the metric equivalent spanner size. Step 2: Determine the thread pitch. gretna sanitation The gauge (imperial) is half the imperial diameter (in 16th of an inch) of the screw head, roughly. uk JANUARY 2024 All dimensions are stated in millimetres unless noted otherwise the standard Blind Bolt Blind Bolt Installation Video ©Blind Bolt Company T: +44(01299) 272955 E: enquiries@blindboltuk * = We strongly recommend the use of our installation gauges when installing these bolts! Allen Bolts, Allen Screws and Allen Sets all describe fasteners that are tightened or loosened with an Allen Key, also widely referred to as a Hex (Hexagonal) Socket Key. A general purpose grade of stainless steel A4 Stainless Steel - Also known as grade 316 or 18/8/3. 5/16 head times two equals 10, minus two equals 8. 26/06/2023 by RCF Bolt & Nut. Many manufacturers still market screws that way, but for those of you who find it frustrating buying in metric, here's a handy conversion chart. This provides a certain amount of play in the holes, which compensates for small misalignment's in hole location or assembly, and aids in the shop and field entry of fasteners. Jul 28, 2008 My 1972 Series 3 seems to have a right mix of different nut and bolt sizes. For nuts the size dimensions used are simply diameter and pitch. Imperial Full Thread Hexagon Bolts are threaded all the way to the head of the bolt. Nuts have "clock markings In the examples below, the circumference line between the line and the dot in a grade B nut is 120˚. But the size of a metric fastener is more accurately specified using diameter, pitch and length dimensions, in millimeters. 27mm X M6 Extended Hot Spun Galvanised Steel U Bolt & 2 Nuts56. But the size of a metric fastener is more accurately specified using diameter, pitch and length dimensions, in millimeters. A bolt torque chart provides the recommended torque values. [4] : 2 The 1884 report specifies a. If unfamiliar with DIN and ISO numbers, they can be thought of as exact fastener names for each specific screw a An in-depth tutorial on how to use a bolt gauge sizing tool. Cycle thread, BSF, BSW and UNF fasteners for classic motorcycles. Metric bolts are referenced using “M” sizes, such as the M8 bolt size. DIN 127B Lock Washer; Close; Nylon Flat. The Chevrolet Bolt EV is one of the more popular electric vehicles. This naming convention of M sizes for screws enables engineers to swiftly identify and match threaded components, thereby facilitating streamlined procurement and assembly processes. If you’re missing a nut or bolt or nut and bolt or faced with a bin at the store filled with various-sized nuts and bolts, there’s no need to scrap your project Measure the length of a bolt from the underside of the bolt head to the end of the shank, and to measure diameter, measure the widest part of the shank of the bolt The pilot hole required depends on the density of wood being used. Our stainless steel U bolts are marine grade quality.
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Thus, the shortening at the crest and root is given by 0. Supplied with superior corrosion protection Greenkote®. Available from Fastenright in sizes M3 to M12 as standard, with a range of finishes also available. Repeat steps 1-3 for the length of the bolt. 47, specify the stud bolt diameter and the number of bolts required in a bolted assembly, based on the pressure class, flange type, and pipe size, and from the stud bolt chart below, you can determine the corresponding nut size. M10; M12; M16; M20; M6; M8;. This is the diameter of the bolt. Hexagonal, Countersunk, Flush Fit in size 1, 2 and 3. They are also known as lag screws or lag bolts. Boltsuk - Your Fixings & Fasteners Specialistco. Safe working loads shown are based on use in A36 structural tube and are applicable to the Hollo-Bolt only in both tension or shear. otchs login An M3 thread bolt is 3 mm in diameter, and similarly an M5 thread bolt is 5 mm. Hole diameter The design shear resistance of bolts F v,Rd as given in EN1993-1-8 Table 3. Hex bolts are available in both metric and imperial thread sizes in a wide range of finishes. Hardware Sizes: Metric Screw Thread. Bolt is best known for its ride-hailing service. It typically consists of a threaded rod or bar with a hook or expansion anchor at one end, and is inserted into a hole drilled into the concrete. Among the most commonly used sizes in the UK, the M6, M8, and M10 bolts stand out. This is the diameter of the bolt. But the company also operates an electric scooter service in 45 cities across Europe. Thread pitch is a designation related to the number of threads per inch on the bolt’s shank. 4 Members subject to bending and tension. Stud bolts are commonly utilized in high-pressure pipework and pipeline flange connections5 and ASME B16. Stud bolts are commonly utilized in high-pressure pipework and pipeline flange connections5 and ASME B16. Guide To Screw Thread Sizes. When buying fabric in bulk, the bolt is. Taper threads are denoted by the letter R. For example, a 5/8-11 (coarse) thread means the nominal major diameter is 5/8"and the 11 means 11 threads per inch Email us at sales@essentracomponentsuk or speak to one of our experts for further. prayer points against evil traps Countersunk preloaded bolts are driven by a recessed slot socket in the head, instead of a hex socket head. Thread sizes for coarse and fine pitch thread were created using the standard sizes from ASME B1 Coarse pitch threads are preferred and should be used whenever possible, as stated in ASME B1 Use our bolt size chart to learn how to measure bolt size and the different dimensions of a bolt. Adjust the jaws of the bolt calliper until they are snug against the bolt. Finding a UK phone directory online can be a daunting task. The M6 bolt, for instance, is frequently employed in furniture assembly and small construction projects due to its moderate strength and size. With their wide range of destinations and carefully curated itinerarie. Stainless Steel U-Bolts, Grade 316 A4 with 2 Nuts, BZP Steel. All dimensions in millimetres BS 3643 Part 1:2007ISO metric screw threads. A variation of BSP with a tapered rather than parallel thread, with the diameter increasing or decreasing along the length of the thread. They both have a similar appearance, but they differ in their applicati. So for example: Thread Size=M The following metric stud bolt size table is meant to help determine the correct size bolt or nut for your purpose. 2 Buckling resistance 54 Buckling length, L 56 Example 5. Fastener Material Key A2 Stainless Steel - Also known as grade 304 or 18/8. The charts below gives the dimensions for Hexagon Head, Socket Cap,Socket Cap - Low Head, Socket Countersink and Socket Button screws with British Standard Whitworth and British Standard Fine Threads Dimensions shown are in Inches, if you wish to convert to mm, please use our universal converter We also have information on Metric and UnifiedBolts. Indices Commodities Currencies Stocks Usain Bolt has scored his first goals for a professional soccer team. to/2DbqzNnVisit our website - http://wwwcomInstagram - http://wwwcom/toolsin. Sometimes, you grab the wrong wrench for a job. If you are measuring a countersunk screw make sure to measure the entire length. Title: US-size-chart-hex-bolt Created Date: 2/16/2017 1:04:55 PM Full technical details and distributor information can be found on our website wwwco. marrying into an enmeshed family 0 x 30mm bolt (metric thread, 6mm diameter, coarse 1. The below charts show all the possible thread size combinations of diameters/pitch as defined in ISO-261. Finding the right number can be tricky, but with a few simple steps you can get the inf. Check the Head Height/Thickness column to ensure that a bolt lays flat to where it's screwed. Looking at the chart above, the thread column refers to the diameter of the bolt in millimeters (mm). Nooky's Nuts are suppliers of high quality fasteners, nuts, bolts and washers. That is often found when trying to match a screw size using Digital Calipers (Inch Decimal to Screw Size) or drill a hole (Screw size to Nearest Fraction) for your project. Anyone should be able to read that and know if it will suit their needs. Re: Anyone have a complete bolt size list for cb750? Like they said, you can get a complete kit from some places like stainless cycle but that's just for the cosmetic ones on the engine. British Association screw threads, or BA screw threads, are a set of small screw threads, the largest being 0BA at 6 mm diameter. They are also known as lag screws or lag bolts. We’re making cities for people, offering better alternatives for every purpose a private car serves — including ride-hailing, shared cars, scooters, and food and grocery delivery.
For a grade C nut, it's 60˚. WE OPERATE A 60 DAY HASSLE FREE RETURN POLICY. Stud bolts are commonly utilized in high-pressure pipework and pipeline flange connections5 and ASME B16. Most newer bed frames (made in the late 20 years) tend to have M8 bolts, while older bed frames may have 5/16th bolts. Both wheel nuts and wheel bolts make it possible. These metric bolt torque charts show the ideal tightening torque for class 89, and 12. As an example, a hex bolt with a thread size of M8 would have an outer diameter of 8mm. Torque values for various grades and diameters of fasteners. supergoop eye brightener Pro-Bolt has supplied the motorcycle industry for 20 years including Racing Teams in MotoGP, Moto2, Moto3, World Superbikes, British Superbikes. Our range includes: Stainless Steel U-Bolts, Standard Leg BZP with 2 Nuts. With so many different. They both have a similar appearance, but they differ in their applicati. list of nsfw reddits uk is an independent, specialist supplier of all types of fixings and fasteners, including bolts and set screws, nuts, washers, screws, machine screws, socket screws, construction fixings, threaded rod, rivets and so much more Order today for free next-day delivery on orders over £60 ex VAT. They are unusual in that they were probably the most "scientific" design of screw, starting with 0BA at 60 mm pitch and progressing in a geometric sequence. For example, a 10mm by 50mm bolt has a diameter of 10mm and a length of 50mm. In the process, the oil drain bolt threads may be stripped or the oil drain bolt h. Its size raises questions about the UK's ability to support NATO, confront Russia, or fight a war. Top things to consider: Consider the material you are screwing into. Also known as an Allen screw or Allen bolt, or simply a cap screw. craigslist finger lakes new york This includes the shank, if your bolt has one. Deciphering European clothing sizes can be quite a puzzle, but there are certain formulas and rules of thumb to guide you. 4 Members subject to bending and tension. Gripped (Anchor) J-bolt. Each size is denoted by the letter 'M' followed by a number.
For instance, clothing size equates to chest circumference divided by. to/2DbqzNnVisit our website - http://wwwcomInstagram - http://wwwcom/toolsin. The outer diameter of the thread (measured in millimetres) is indicated by the number in the system. Jul 28, 2008 My 1972 Series 3 seems to have a right mix of different nut and bolt sizes. Hexagon set screws, or hex sets to give them their common name, are available in both metric and imperial thread sizes in a wide range of finishes. 0 x 30mm bolt (metric thread, 6mm diameter, coarse 1. Step 1: Measure the shank’s diameter. The formula is as follows: (Head diameter in sixteenths is an inch X 2 ) - 2 = Gaugeg. The second chart below is a US fraction to metric mm for the more c. A bolt torque table is a valuable tool that provides the recommended torque values f. These are known as clearance holes. DIN 580-A2 Lifting Eye Bolt; Close; Brass / Bronze DIN 933 / ISO 4017 Hex Cap Screw Fully Threaded; DIN 125 / ISO 7089, 7090 Flat Washer; DIN 934 Hex Nut; DIN 84 Slotted Cheese Head Machine Screw; DIN 963 Slotted Flat Head Countersunk Machine Screw; DIN 975 Threaded Rod; Bronze. Imperial Full Thread Hexagon Bolts are threaded all the way to the head of the bolt. 34mm wide, and ¼’’ is 6 Bolt is the first European mobility super-app. CE and UKCA marked in accordance with EN 14399-1. Coach Screws vs Coach Bolts. Our A2 grade stainless steel U bolts come with a plate, nuts and washers. WE OPERATE A 60 DAY HASSLE FREE RETURN POLICY. Bolts are used by BMW and around 2010 when BMW started introducing the F models, eg 3 series F30, they also changed the thread size of the bolts. Bed bolts for headboards come in different sizes and lengths. Again, you find that bolts 1/2 and 9/16 have a head height of around 0. FREE DELIVERY ON ORDERS OVER £50. fortnite gpc script Print Out Size Charts for Free. Anyone should be able to read that and know if it will suit their needs. If the pitch is the normally used "coarse" pitch listed in ISO 261 or. The across-flats definition is the common. The world of bolts and nuts is vast and complex, but understanding the basics can lead to successful projects and satisfied clients. The width of the hexagon nuts across flats s is specified in ISO 898-2 Table A. Usually specified as M then a number x another number. Tolerances on nominal length Andrews Fasteners Ltd. Understanding bolt thread sizes, specifically UNC (Unified National Coarse) and UNF (Unified National Fine), requires delving into the distinctions between threads per inch (TPI) and thread pitch. Thus, the shortening at the crest and root is given by 0. Hole diameter The design shear resistance of bolts F v,Rd as given in EN1993-1-8 Table 3. Nooky's Nuts are suppliers of high quality fasteners, nuts, bolts and washers. Grade 5 bolts are typically used in automotive applications. Faceplate: 162 x 25mm. Backset: 45 or 57mm. However, common widths range from 10132 cm (40 to 108 inches). For nuts the size dimensions used are simply diameter and pitch. For nuts the size dimensions used are simply diameter and pitch. The first number is typically between 0 and 10, while the second number is usually between 1/16 and 1 inch. Among the most commonly used sizes in the UK, the M6, M8, and M10 bolts stand out. 18083 p at both crest and root. This calculator is for guidance only. Bolt lengths are approximate for flange - flange duty assuming one 1/16" gasket & one bolt washer. lenroot maetzold funeral home Finding the right number can be tricky, but with a few simple steps you can get the inf. Hole diameter The design shear resistance of bolts F v,Rd as given in EN1993-1-8 Table 3. Gripped (Anchor) J-bolt. The precise relationship of imperial screw head sizes and the gauge can be calculated. Imperial Full Thread Hexagon Bolts are threaded all the way to the head of the bolt. Calculating diameter and length is a critical part of identifying screws and bolts. Specification for selected limits of size. Read the measurement on the bolt calliper. As an example, a hex bolt with a thread size of M8 would have an outer diameter of 8mm. They work by being inserted into a drilled hole and then hammering a bolt through, inserting the washer and the nut and then tightening to. Spanners come in various types, such as open-end, ring, combination, and. If you are measuring a countersunk screw make sure to measure the entire length. To do this, use a pitch gauge. In a report released today, So. All Standard TCBs from Tension Control Bolts Ltd are: High strength structural bolting assemblies for preloading, System HRC9/10. Google is one of the most popular and widely used search engines in the world. When it comes to assembling and tightening bolts, using a bolt torque chart is essential. Metric Hex Bolt Dimensions * All measurements in millimeters * Bolt is the all-in-one mobility app. We’re making cities for people, offering better alternatives for every purpose a private car serves — including ride-hailing, shared cars, scooters, and food and grocery delivery. We’re making cities for people, offering better alternatives for every purpose a private car serves — including ride-hailing, shared cars, scooters, and food and grocery delivery. Hex keys are most often encountered as a single piece of steel formed into a small L-shape, although there are a number of variations on this basic format. Available in Zinc Plated Steel, Galvanised Steel, T304 (A2) Stainless Steel & T316 (A4) Marine Grade Stainless Steel. The following table of hex bolt head dimensions was adapted from ASME B183, Table 29, "Dimensions of Plain (Unslotted) and Slotted Regular and Large Hex Head Screws. Similar to bolts, nuts come in various sizes, and selecting the appropriate one is paramount.