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Typical clearance hole sizes are given in the table below along with the correct tapping hole size for each size of standard and fine pitch thread. The first number gives the breaking strength of the steel in the bolt. These cookies do not store any personal information. You also have the option to opt-out of these cookies. min. The difference in strength between different grades is quite dramatic: the highest standard grade being capable of carrying more than three times as much load as the lowest grade. Metric bolts are made fractionally under their stated size, for instance an M16 bolt will have a shank diameter of typically 15.97mm. GENERAL DIMENSIONS OF STRUCTURAL NUTS. The strength of the threaded connection is the strength of the weakest part so, for example, if a high tensile bolt is screwed into a softer, more ductile material such as an aluminium alloy or low carbon steel part then it will be the softer part which dictates the maximum torque which can safely be applied to the bolt. £3.58. Where the grade is given as a number it may be stamped on the top of the nut or on one of the flat sides. lower torque is applicable. With metric threads tapping drill size is easy to work out because it is the bolt diameter minus the thread pitch so, for example, a standard pitch M16 bolt has a pitch of 2.0mm so the tapping drill size is 16 – 2 = 14mm. on EU orders of over £60 nett. We are always grateful for any comments or criticisms of our technical publications and are happy to offer advice on all aspects of plant and machinery maintenance. Although various special threads are defined by the ISO standard only two are in common use in most machinery, the others are mainly used in specialist equipment such as precision instruments, optical instruments, etc. In practice, manufacturers will design their machinery so that the bolts carry a the bolt and a lower torque is almost always required to avoid stripping the Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Fine pitch bolts will be typically 10% stronger than coarse pitch bolts because GL14 2NZ 89mm X M16 Grip Bright Zinc Plated Steel U Bolt & 2 Nuts. min. Farnell offers fast quotes, same day dispatch, fast delivery, wide inventory, datasheets & technical support. Standard Metric Thread Eye Nuts - Range from 200kg to 2200kg - Drop Forged Standard Eye nuts. Usually the markings are on the top of the bolt head but sometimes they are on the side. max. Free returns. 100mm X M16 Bright Zinc Plated Steel Folded Eye Bolt & 1 Nut. Thomson Engineering Design produce an unparalleled range of machines, attachments and tools for track renewal and maintenance. It is mandatory to procure user consent prior to running these cookies on your website. Put the dot at the twelve O-Clock positions and the line shows the grade. These are the maximum tightening torques recommended in the standards for We also use third-party cookies that help us analyze and understand how you use this website. This category only includes cookies that ensures basic functionalities and security features of the website. Popularly used in all assemblies, a standard hex bolt is a staple across the world. Click here to check it out. Doing a bolt up to the specified torque should set the tension in the bolt to approximately 85% of the proof load given in the table on page 6. There are nineteen standard sizes – known as the ‘preferred ‘ sizes and ten less commonly used (the so-called ‘non-preferred’) sizes. These are known as clearance holes. Always refer to the machine manufacturers’ maintenance documentation for the specified torque of bolts and nuts used in lifting and load bearing applications. max. Correct Spanner and Allen Key sizes are given in the table below for the normal range of bolt and nut sizes found in plant and machinery. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Farnell offers fast quotes, same day dispatch, fast delivery, wide inventory, datasheets & technical support. Recent News. min. Leyton Fasteners have been Advising and Supplying Trade and Industry on quality Fasteners and Fixings for over 35 years. M16 x 50 Grade 8.8 High Tensile Hexagon Head Bolt DIN 931, Zinc Plated More details Buy M16 Hex Nuts. threads. On the head of each bolt are two numbers separated by a decimal point, the full list includes ten grades from 3.6 to 14.9 but in plant and machinery only grades 8.8, 9.8, 10.9 and 12.9 are normally found. © Leyton Fasteners 2020. Thousands of products. 0151 355 8045 sales@leytonfasteners ... sales@leytonfasteners.co.uk; Find us on: Facebook page opens in new window. such as an aluminium casting, the thread in the block may be far weaker than 150mm X M16 Bright Zinc Plated Steel Folded Eye Bolt & 1 Nut. ). Heavy hex nut dimensions in inches are covered in ASME B18.2.2 Square and Hex Nuts, however, the dimensions in matrix unit are covered in ASME B18.2.4.6M Heavy Hex Nuts. Tel: 01594 82 66 11 Fax: 01594 82 55 60 Email: sales@thomsondesignuk.com. Few parts are as critical in the assembly of modern machinery as the nuts and bolts which hold it all together and, at first sight, it seems that all metric bolts are basically the same. Metric Full Nuts Page <1> 03/04/12 V1.1 www.element14.com www.farnell.com www.newark.com www.cpc.co.uk www.mcmelectronics.com Important Notice : This data sheet and its contents (the "Information") belong to the members of the Premier Farnell group of companies (the "Group") or are licensed to it.No licence is granted for the use of 19.20 M16 2.0 27.0 26.16 31.2 29.56 17.1 16.0 24.90 M20 2.5 32.0 31.00 36.9 35.03 21.3 20.0 29.50 M24 3.0 … For example, a grade 12.9 bolt will begin to stretch when the load on the bolt is 90% of the breaking load. By using this form you agree with the storage and handling of your data by this website. Every effort has been made to ensure that the information contained in this document is correct but no guarantee can be given nor liability accepted for errors or omissions. The screw and nut sizes are in accordance with BS 3692:1967 (ISO 272 equivalent). Example: Hex nut, style 1, M10 × 1.5, ASTM A563M class 10, zinc plated Heavy hex nut, M20 × 2.5, silicon bronze, ASTM F467, grade 651 Slotted hex nut, M20, ASTM A563M class 10. The maximum recommended torques given in the table below assume that the threads are lightly oiled. Many factors affect the strength of threads in components including on UK orders of over £40 nett. Nut Thickness (T) 13mm: Nut Thickness (T) Tolerance +0/-0.7mm: Nut Width A/F (F) 24mm: Nut Width A/F (F) Tolerance +0/-0.33mm: Nut Width A/P (C) 26.75mm: Thread Pitch: 2mm: Thread Size: … Copyright: Thomson Engineering Design Ltd all rights reserved, Answers to the most Frequently Asked Questions, How to Identify the Strength Grade of Nuts and Bolts, How the Diff erent Strength Grades Compare, ONLY USE THE TORQUE SETTINGS GIVEN IN THE TABLE BELOW WHERE. min. Free next day delivery available. DIN 439 – Hexagon thin nuts Nut dia. To minimise the risk of a spanner slipping and marring the corners of a fastener, it is good practise to use ring spanners (or the ring end of a combination spanner) whenever possible. Leyton Fasteners will be able to help you irrespective of it being a new project, a repair, part of planned maintenance or a restoration project, friendly expert advice is always available. Clock face grade marks are shown in the illustration (right). The bolt head should also have a code – normally two or three letters – indicating the manufacturer. The thread form is in accordance with BS 3643:2007 All dimensions in millimetres. This is commonly the case in lifting devices where But opting out of some of these cookies may affect your browsing experience. M16 2.00 23.20 24.00 27.70 16 M18 2.50 26.20 27.00 31.20 18 M20 2.50 29.20 30.00 34.60 20 M22 2.50 31.20 32.00 37.00 22 ... Dimensions of Heavy Hexagon Nuts Metrics Series Width Across Flats Width Across Corners Thickness for Heavy Hex. No matter what the job Leyton Fasteners can give the advice and supply the correct quality product. Metric bolts are made fractionally under their stated size, for instance an M16 bolt will have a shank diameter of typically 15.97mm. This standard has now been superseded by BS 3692:2001. In round terms it is in 10’s of kg per square millimeter of the bolt. nut size; m16: 1.5: 16: 0.6299: 24: m18: 2: 18: 0.7087: 27: m18: 1.5: 18: 0.7087: 27: m20: 2: … Relevant Standards. © 2021 Thomsonrail. high factors of safety are required. Nuts Pitch mm. Buy Online M16 steel Hexagon set screws, washers and nuts in a variety of styles in brass or BZP finished steel. A grade 12.9 bolt should be fitted with a grade 12 or grade 14 nut. Necessary cookies are absolutely essential for the website to function properly. This short guide is intended to give a very basic introduction to ISO metric nuts and bolts. the manufacturer’s maintenance documentation should give the required Hex Head Bolts DIN 931 (ISO 4014) M16 in A2 Stainless Steel The most common type of fastener, a hex head bolt is designed to be tightened with a standard spanner or ratchet and socket. Metric Nuts M16 in A2 Stainless Steel. Leyton Fasteners have compiled a useful nut dimensions comparison chart for metric & unified nuts. All these factors will add up to produce a thread which does not fit the bolt exactly as it should and the joint may therefore be weakened. When deciding how much load a bolt should be allowed to carry the standards define a ‘proof load’ – typically around 90% of the load at which the bolt begins to stretch. The most common thread diameter and pitch combinations found in plant and machinery are listed in the table below: Except for the very lowest grades, metric nuts and bolts all carry identification markings which indicate their strength. This means that a 16mm bolt will fit through a 16mm hole but to allow for misalignment between parts it is common practice to drill bolt holes slightly larger. THE MACHINE MANUFACTURER HAS NOT SPECIFIED A TORQUE. These cookies will be stored in your browser only with your consent. Buy M16 Nuts at Screwfix.com. max. Similarly a grade 9.8 bolt will begin to stretch at 80% of its breaking load. Proof loads are normally given in Newtons in manufacturers tables but here we’ve converted them into kg force. Similarly a grade 8.8 bolt will not snap until it is carrying a load of 80kg per square millimetre. If you are responsible for repairing and maintaining machinery, particularly if that machinery is involved in lifting operation or other safety critical applications then you will be aware of the importance of fitting the right parts in the right way. There are no fewer than 5 different threads for different applications and 10 different standard strength grades defined for each size of bolt. 94mm X M16 Non-Grip Bright Zinc Plated Steel U Bolt & 2 Nuts. P. Nominal Size … Nut Diameter: Nut: Size: Pitch: Major: Minor Max - min: Thick (Zn) M6: 0,75: 6,000: 5,378 - 5,188: 5,00: M8: 1,00: 8,000: 7,153 - 6,917: 6,50: M10: 1,25: 10,000: 8,912 - 8,647: 8,00: M12: 1,25: 12,000: 10,912 - 10,647: 10,00: M16: 1,50: 16,000: 14,676 - 14,376: 13,00: M20: 1,50: 20,000: 18,676 - 18,376: 16,00: M24: 2,0: 24,000: 22,210 - 21,835: 19,00: M30: 2,0: 30,000: 28,210 - 27,835: 24,00: M36: 3,0: 36,00: … In fact, of course, nothing could be further from the truth. Thomson Engineering Design Ltd, Valley Road, Cinderford, Glos. Should you have any feedback concerning this document please contact us: M16 Hexagon Full Nut to DIN in Grade 8 Steel Zinc & Clear Cr3 with dimensional measurements and 3D model, in a range of finishes For example, a grade 12.9 bolt will not snap until every square millimetre of the bolt cross section is carrying a load of at least 120 kg. Buy M16 x 1.5 Cable Gland Locknuts. We use cookies to track usage and preferences. Fasteners - Bolts, nuts and threaded rods - torque, tension and loads; Related Documents . M12 1.75 21.0 20.16 24.25 22.78 13.1 12.0 Actual size across flats. A bolt will begin to stretch before it finally breaks, the second number on the head of the bolt indicates how much of the breaking strength the bolt can stand before it starts to stretch. There may be trouble ahead 20/01/2021. torque in each case. D P s e m Dt max. This short guide is intended to give you the information you need to be able to correctly identify and use the metric nuts and bolts most commonly found in plant and machinery. how the thread is produced, the surface finish and the accuracy of the Nut Height (T) 13mm: Nut Width A/F (F) 24mm: Pitch: 2mm: Screw Depth Max: 21.42mm: Screw Depth Min: 20.58mm: Thread Size: M16 (16mm) Total Height (L) 28mm Heritage Steam; Rail and Road transport Fasteners, We get involved in some interesting things…. m16 t nuts at Cromwell. £1.44. The rule is that the grade of the nut should always be the same as the bolt grade or one grade higher so: a grade 8.8 bolt should be fitted with a grade 8 or grade 9 nut. This means that a 16mm bolt will fit through a 16mm hole but to allow for misalignment between parts it is common practice to drill bolt holes slightly larger. thread shape. When tapping a hole, particularly M10 and smaller, remember to keep removing the tap from the hole and blowing away the swarf to prevent the tap jamming and breaking. All rights reserved. Similarly, if the thread is made by drilling and tapping a hole the size of the drilled hole may vary depending on how accurately the drill has been sharpened and how worn the drill is, the hole might not be precisely straight and the tap might be blunt or worn. lot less than the proof load to give a good safety factor to the design. Why Manufacturers Sometimes Specify a Lower Torque, Tapping Drill and Clearance Hole Drill Sizes, How to identify nut and bolt strength grades, Why specified torque is sometimes lower than the maximum, Spanner Sizes Versus Bolt / Nut thread size, Allen Key size versus Bolt / Nut thread size, Correct Drill size for Tapping Metric threads in holes. The proof load is usually considered to be the absolute maximum load which a bolt should be asked to carry. Here, I have listed the Heavy hex nut dimensions as per ISO and UNC. (The data has not yet been checked against the latest revision. Cromwell is UK's leading tools and MRO supplier, featuring the widest range of products from all leading brands. Delivery 7 days a week. The situation on is almost as complex with metric nuts which come in a wide variety of types (full, thin, nyloc, castellated…..) and 5 strength grades as well as the same range of sizes. Skip to content. THE MACHINE MANUFACTURER HAS NOT SPECIFIED A TORQUE. It is intended for those working in plant and machinery maintenance to give enough information on to ensure that correct replacement parts are identified and used. less metal is cut away to make the thread. Fine threads are often used where a bolt is screwed into a soft metal block, Design Engineers have to consider all these factors and may decide that a Thread Pitch Width across flats Width across corners Nut height Washer-face or chamfer dia. DIN 439/936 Lock Nut (Hexagon Thin Nut) Basic dimensions for selected sized. The pitch of a thread is the distance between two adjacent threads and is measured in millimetres. 24 Hour UK next day delivery. Related Topics . Standard Metric Hex Jam Nuts and Heavy Hex Nuts ANSI B18.2.4.5M and B18.2.4.6M The table below gives tapping drill sizes for threads corresponding to the thread pitches given in the table on page 3. The two threads most commonly found in plant and machinery are commonly known as ‘standard’ and ‘fine’ pitch. 248-4387 is an M3 A2 Stainless Steel Dome Nut 248-4393 is an M4 A2 Stainless Steel Dome Nut 248-4400 is an M5 A2 Stainless Steel Dome Nut 248-4416 is an M6 A2 Stainless Steel Dome Nut 248-4422 is an M8 A2 Stainless Steel Dome Nut 248-4438 is an M10 A2 Stainless Steel Dome Nut 248-4444 is an M12 A2 Stainless Steel Dome Nut 797-6080 is an M16 A2 Stainless Steel Dome Nut 797-6099 is an … Nuts Finished and Heavy Hex Nuts 4-1 Hexagon Machine Screw Nuts 4-2 Type A Forged Wing Nuts 4-3 Hex Slotted Nuts 4-4 Hex and Heavy Hex Jam Nuts 4-5 to 4-6 Hex Castle Nuts 4-7 Large Diameter Hexagon Head Cap Nuts 4-8 Round Spanner Nuts 4-9 Heavy Hex Nuts with Tommy Bar Holes 4-10 Sockets & Pins Socket Head Cap Screws 5-1 different bolt sizes and grades. M16 x 35mm Hex Bolt/Nut & Washer Set (BZP) x 10 Quantity £15.51£15.51 Get it Friday, Oct 9 AHC K-ZYTB16150B5 M16 x 150 mm Through Bolts - Zinc Plated (Pack of 5) If you have any questions about our products please call us or complete the contact form below. The strength grade marking is more difficult to see on metric nuts, sometimes it is given as a number, sometimes as a pattern of a dot and a line where the position of the line indicates the grade like the hands of a clock. AS1252 - 1983 Nom. This website uses cookies to improve your experience while you navigate through the website. Fine pitch nuts and bolts are normally only used in special circumstances and ONLY USE THE TORQUE SETTINGS GIVEN IN THE TABLE BELOW WHERE ISO 724 - Metric Threads - Dimensions of metric threads according ISO 724; Metric Bolt Head and Wrench Size - ANSI/SO, DIN and JIS bolts As we said on page 4, if a bolt is gradually loaded there comes a point when it begins to stretch and after that a point where it actually breaks. 3-34 121 - www.fabory.com 3 Hexagon thin nut MF11070 Hexagon thin nut MF Hexagon thin nut MF DIN 439 B (1987) NEN 2334 B ANSI B18.2.4.5M NF E25-453 Technical data dms M8 413 M10 517 M12 619 M14 722 M16 824 M18 927 M20 10 30 M22 11 32 M24 12 36 M27 13,5 41 M28 (≠DIN) 14 41M30 15 46 M32 (≠DIN) 16 50M33 16,5 50 M35 (≠DIN) 17,5 55M36 18 55 M38 (≠DIN) 19 60M39 19,5 60 dms

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