Note: it is a requirment of ASTM AM & ASTM FM standard theat the bolt nut & washer should be assembled and supplied by one manufacturer who shall . ASTM Standards: A Specification for Zinc Coating (Hot-Dip) on Iron and. Steel Hardware2. A M Specification for High-Strength Bolts for Struc-. ASTM AM 碳合金钢螺母 – ASTM American Society for Testing and Materials(美国材料与试验协会)成立于年,是美国最老.
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Hex nuts made to the requirements of DH3 shall be marked with the symbol HX3 on one face. E Non-zinc-coated nuts are nuts intended for use with externally threaded fasteners, which have a plain nonplated or noncoated finish or a have a plating or coating of insufficient thickness to necessitate overtapping the nut thread to provide assembiability. NOTE 2— Proof loads are computed by multiplying proof load stress Table 3 by thread stress area and dividing by Originally approved in Purchasers are cautioned to consider the dimensional requirements of the application when selecting the most appropriate nut.
Zinc-coated nuts are nuts intended for use with externally threaded fasteners which are hot-dip zinc-coated, mechanically zinc-coated, or have a plating or coating of sufficient thickness to necessitate overtapping the nut thread to provide assemblability. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
NOTE 6—It is the intent of 4. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Heat analysis Product analysis Titanium: Plain Uncoated Nuts 7.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Heat analysis Product analysis Silicon: Note 3 — This specification is the metric companion of Specification A This abstract is a brief summary of the referenced standard.
Heat analysis Astn analysis Copper: We need your help! Heat analysis Product analysis Phosphorus: Packaging and Package Marking When the dimensional style of the nut is not designated by the purchaser, hex nuts, Style 2, in conformance with ANSI B Additional tests of individual shipments of material are not ordinarily contemplated.
Your comments are invited either for revision of this standard or for ast, standards and should be addressed to ASTM International Headquarters. B Acid bessemer steel only.
For smaller quantities A Gr. A number aetm parentheses indicates the year of last reapproval. Selection of steel analysis shall be the option of the manufacturer.
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Number of Nuts in Lot and under to to 22 Over 22 Number of Specimens 1 2 astn 5 This section may also include descriptions of the changes or reasons for the changes, or both. NOTE 10—If the overtapping diametral allowance is greater than the limit specied in 7.
Class 12 nuts in nominal thread diameters M42 and larger shall conform to astj for heavy hex nuts given in ANSI B Nominal Nut Size, in. Specification F, or otherwise hot-dip coated, shall be tapped oversize by a diametral amount sufficient to permit assembly on the coated bolt thread, unless other requirements are specified in the inquiry or purchase order.
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Slotted hex nuts are not normally proof load tested. When the dimensional style of nut is not designated by the purchaser, hex nuts, Style 1, in conformance with ANSI B Selection of the class shall be at the option of the manufacturer.
Committee F16 has identified the location of selected changes to this standard since the last issue A—07 that may impact the use of this standard. Class 8S3 nuts may be made of any of the listed steel analyses. Please help us to share our service with your friends.
Historical Version s – view previous versions of standard. Materials shall be tested and the individual grades shall conform to specified values of material such as hardness and proof load, chemical, and mechanical requirements.
Threads of nuts tapped prior to zinc coating 4. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition see 5.
Number of Tests 9.