The industrial fasteners institute and the representatives providing this material assume no responsibility for the content. To be the globally recognized, north american focused, leading. The tolerance system for metric threads is composed of a two sets of a number followed by a letter. Our selection of metric fasteners in din and iso standards will provide you with highquality fasteners for your next job. Asme standard bolts, screws, nuts, washers, studs and other fasteners in metric and imperial sizes. Head sizes may differ from what is shows due to differences between metric standards measure length from under the mm 10 20 30 40 50 60 70 80 90 100. The world leader international certifications the unbrako production facilities are iso 9001, isots 16949, iso 14001, and bs ohsas 18001 certified. Under the metric system, each of the eight product types would have its own individual standard. Metric threads are measured by the distance between two adjacent threads in millimeters pitch. Fastener standards address the dimensions, testing, and use of screws, bolts, nuts, rivets, flanges, studs, and so forth. Sae j1237 mar2001 metric thread rolling screws sae j1648 aug1996 protective coatings for fasteners sae j1701 mar1999 torquetension tightening for inch series fasteners sae j1701m.
As with unified fasteners, metric bolts will be stamped to designate the type of stainless steel that they are. Ajax fasteners quality assurance procedure conforms to australian standard suppliers. Jis specialty bolts these bolts meet the old jis specification. Metric threads are defined in the standards document iso 9651. Metric thread specifications always begin with thread series designation for example m or mj, followed by. Metric fasteners a number of american national standards covering metric bolts, screws, nuts, and washers have been established in cooperation with the department of defense in such a way that they could be used by the government for procurement purposes. Thirty years on, this vision is still paramount, a service that delivers a range of fasteners on time, every time. The 9th edition has over 80 of the most commonly used inch fastener. Metric thread specifications always begin with thread series designation for example m or mj, followed by the fastener s nominal diameter and thread pitch both in units of millimeters separated by the symbol x. Reference consensus standards referred to in the unbrako engineering guide were current at the time of publication.
General fastener standards american national standards. Bs 3382, electroplated coatings on threaded components. Metric property class size range mechanical properties per din 267 part 4 internally threaded fasteners proof stress core hardness rockwell mpa max. Metric fasteners a number of american national standards covering metric bolts, screws, nuts, and washers have been established in cooperation with the department of defense in such a way that they. Unfortunately, there are currently three similar, yet slightly different metric fastener standard systems in use.
The metric system has its own unique way of marking and designating stainless steel fasteners. The complete information may be found in appendix b or asme b18. Industrial fasteners institute ifi iso fastener standards. Plain washers for bolts, screws and nuts with nominal thread diameters from 1 mm up to and including 150 mm product grades a and c. Then you can start reading kindle books on your smartphone, tablet, or computer no kindle. Iso fastener standards should be referenced for all metric fasteners metric fasteners are used throughout the world to assemble most products that are traded internationally. Astms fastener standards are instrumental in specifying, testing, and evaluating the material, dimensional, mechanical, and metallurgical properties of the various forms of hardware fasteners.
Industrial fasteners institute 2014, hardcover, 1155 pages from the publisher. The following british standards will be found useful for reference. Boltport manufacturers asme standard fasteners in full range of material grades and specifications. Standardization of dimensions, tolerances, mechanical and functional properties, test methods and acceptance procedures of fasteners. Din formally withdrew most of its fastener standards in. Hexagon head bolts with metric fine pitch thread product grades a and b. Iso metric screw threads are designated by basic diameter and thread pitch. Metric thread specifications always begin with thread series designation for example m or mj. Just because of historical purchases, many users of metric fasteners still call for din fasteners. Mmcc is currently open and operating at all our 5 us locations. The use of precision fasteners in the worldwide market has led to the creation of many standards. Fastener standards and guidelines american fastener technologies corporation is pleased to present you with these useful standards and guidelines for nuts, bolts, and other fasteners. These fasteners are used to mechanically join or affix other hardware objects together, and come in many forms which include rivets, nuts, bolts, studs, screws, washers, eyebolts, nails, and threaded fasteners.
Thread standards and definitions united states, canada, and united kingdom use the unified of unified inch profile, in accordance with the unified and american screw threads asa b1. Industrial fasteners institute 6363 oak tree boulevard independence, ohio 441 usa, all standards and specifications are advisory only. Our collection includes metric studs, snap rings, bolts and more. They have smaller heads than standard metric bolts. Always refer to project specifications and consult an engineer to ensure that your. American fastener technologies corporation is pleased to present you with these useful standards and guidelines for nuts, bolts, and other fasteners. The organization of the book is designed to make it easy for the user to find his information in. For more information on these and other guidelines, please phone us at 18004669780. Representing the interests of north american mechanical fastener manufacturers since 1931.
Most plating specifications now state that a plated carbon steel fastener shall be baked for not less than 23 hours at. General fastener standards include dictionaries of terminology, abbreviations, and designations applicable to multiple types of fasteners, across multiple applications and industries, serving as a. For a given diameter, a fastener may be available in coarse standard, fine and sometimes super fine thread. Threads on a standard inch based fastener are measured by counting the number of threads per inch. Jis bolts are available only in diameters where the head size. Metric din 933 hexagon head cap screws bolts full thread. Extensive information concerning these metric fasteners is given in the following text and. With ubiquitous usage in many fields of industry, fasteners come in a similarly wide. Mudge fasteners carries a range of metric screws, bolts, nuts, washers and more. Metric fasteners purchase standard metric studs, snap. The naams global standard components stamping and assembly are produced and maintained in a joint effort by daimlerchrysler corporation, ford motor company, general motors corporation and. Metric thread extended thread size range iso thread height male thread h3 thread height female thread h1 sorted by thread class click here to return to the thread data chart page. The tables below are provided as a general guide to help you better understand metric and imperial measurements.
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