Grade a4 stainless steel in coarse and fine threads. Strength grade designations for steel bolts and screws 10. Except for the very lowest grades, metric nuts and bolts all carry identification markings which indicate their strength. Flat washers are used to improve stress distribution, and to span large clearance holes. 3: extract from din en iso 88-1, test forces for iso metric standard thread. Metric din 63 are slotted drive flat countersunk head machine screws. Specification no copying without bsi permission except as permitted by copyright law. There are several grades of bolts but the three common grades for sae are 2, 5 and 8. 8 roughly corresponds in strength to an sae grade 2 bolt. 94 267 475/1 tolerance values for metric fasteners 315 malleable cast wing nuts 43b 4035 hex jam nuts 433 702 flat washers, small o. This chart helps to identify the grades of bolts using the identification marks on the bolts head. Mechanical properties of externally threaded fasteners. Plain washers for metric bolts, screws and nuts for general purposes. Iso 88-2, mechanical properties of fasteners made of carbon steel and. Sundram fasteners limited fasteners division fd hexagonal flange bolt.
Standard specification for nonferrous bolts, hex cap screws. Grade b5 bolts, screws, studs for high? Temperature service astm a13 grade b6 bolts, screws, studs for high? Temperature service astm a13 grade b7 bolts. Mechanical properties of fasteners made of carbon steel and alloy steel. C with triangular iso metric thread according to iso 68-1. Mechanical properties of internally threaded fasteners - din 267 part 4. The higher the iso numbers are, the stronger the bolt. Fastener terms and abbreviations below are three ways of describing the same fastener: 1. Good for use outdoors and in washdown environments, these metric 18-8 stainless steel screws are more corrosion. Metric fasteners can also have extra fine pitch thread. 389 View parts by clicking on the following link: din 1587 hexagon domed cap nuts din deutsches institut fur normung. Standard specification for style 1 stainless steel metric nuts metric. Grade 8 54 wing nuts metric / bsw 55 flat round washers metric / imperial 56 spring washers. Torque values for metric bolts for abb drives screw. Download, fill in and print bolt grade markings and strength chart pdf online here for free. Screws - 1 sae 1 sae tpi grade 5 14 grade 8 14 surface condition torque adjustment factors plain steel, as supplied x 1. 3506 mechanical properties of corrosion-resistant stainless-steel fasteners. Contact american fastener with any questions or for a custom quote.
, visit our website or call us today at 800-544-1624. Chart 2 yield points for free common bolt grades tightening torque 2. Head the head of a fastener is the enlarged shape preformed on one end of a headed fastener to provide a bearing surface. Surface of the fastener and the part to which it is attached. The grade of a bolt determines the maximum amount of. Appropriate class is intended to provide an assembly capable of being. Externally-threaded fasteners --metric series property class: designation nominal size of; product. 8 fasteners are generally made out of medium carbon steel with aisi grades 1038,1541, 5132. For fine, coarse or extra fine hex bolts, grade 10. A bolt with metric thread pitch made from medium carbon alloy steel and heat-treated. Length is measured from under the head to the end of the bolt note: head sizes may di?Er from what is shown due to di?Erences between metric standards length 16mm. Stress-strain diagram of a screw with strength class 10. Grade 5 per sae j42, zinc/clear plated per astm b633. Steel grade sae 5 sae 8 socket head cap screws property class 8. The numbering system is very simple; the number that appears before the. Thread d mm, pitch p mm, nominal stress area as,nom mm2, property class. 134 Most astm specifications allow for the production of metric series and inch series fasteners from the same specification. Any alloy steel capable of meeting the tensile requirements of specification a354. Bel-metric sells metric hardware across the nation.
Fastener material specification systems have been developed according to this. Metric bolt properties, grades, and strength - free download as pdf file, text file. 715 Tensile strength: the maximum load in tension pulling apart which a material can withstand before breaking or. Note: metric hex socket cap screws are available in lower strength grades. Imperial grades ibf/in2 psi metric classes mpa n/mm2 l -- 180,000 psi -- high tensile: class 12. 2 a the specification for iso metric precision bolts all grades is bs362. Metric machine screws are designed for metal to metal applications requiring a pre-drilled. Metric 18-8 stainless steel pan head slotted screws. Din en iso 3506 governs screws and nuts made from stainless steel. Bolt grades metric pdf i was recently hired to evaluate the static load of a mount and the effects on fasteners and components under preloaded conditions. 2f grade mark reference standard: din 621 manufacturing range: pitch grades: 8. In metric bolts there are 3 commonly used classes, 8. Grade-a bolts are the preferred style for most applications.
Where the proof load is not quoted in the specification this. The equivalent metric standard is astm a325m, which is titled standard specification for structural bolts, steel, heat treated 830 mpa minimum tensile. 247 Standard specification for hardened steel washers inch and metric dimensions. This edition cross-refers to tables for mechanical properties of bolts, and brings the specification into line with bs en iso 88-1. Examples of correct nut selections for given bolts: thread bolt grade bolts. Produced with a class 2a fit for bolts and a class 2b fit for nuts. Fastenerblackb subject: metric bolt classes keywords: metric bolt grades; metric bolt classes; bolt. Socket head cap screw torque in pound foot or pound inch torque in newton meter - nm. Download a complimentary pdf of our fastener markings chart. Stainless bolts, metric bolts will have a metric property class designation stamped on the head. Nuts: tightening torques author: fastener mart created date: 8/12/2006. Metric bolt ultimate tensile strength by iso property class newtons. For metric bolts strength is according iso 88 mechanical properties of fasteners made of carbon steel and alloy steel described by. 1/4 20 unc class 2a x 1 hex head cap screw per asme b18. Bolts in a wide range of standard, coarse and fine sizes. Sae j42 grade 8, astm a354 grade bd, astm a40, astm a13 b7 are all common examples of alloy steel fasteners.
Metric bolt grade mechanical requirements for carbon steel. The metric system designates strength capabilities via property classes rather than grades. Strength grade designations 5 21-22 breaking and yield loads of ajax bolts 6 23-36 ajax bsw bolts as 2451 24 ajax cup head bsw bolts asb108 25 ajax unified high. Thread runout bolts and underhead distance screws 5 table 6. English/ metric bolt substitution table equivalent metric bolt substitution. The torque figures quoted have been based on a theoretical bolt load equal to 85 of the. Are manufactured using medium carbon steel, medium carbon steel alloy and low carbon boron steel that has been quenched and. 672 - set screws metric fine page 18 - stainless steel set screws page 1 - rag bolt. Strength grades for metric fasteners are designated by a symbol comprised of 2 numbers, separated by a decimal. Failure of threaded fasteners due to over - tightening can occur by bolt shank.