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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Class 12 nuts in nominal thread diameters M42 and larger shall conform to dimensions for heavy hex nuts given in ANSI B The manufacturer shall afford the inspector all a563 facilities to satisfy him that the material is being furnished in accordance with this specification.

Originally approved in When properly exposed to the atmosphere, these steels can be used bare uncoated for many applications.

Asrm 9—If the over-tapping diametral allowance is greater than the limit specied in 7. Note 3 — This specification is the metric companion of Specification A Heat analysis Product analysis Titanium: Heat analysis Product analysis Manganese: Packaging and Package Marking Heat analysis Product analysis Nickel: 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 4—Purchasers are cautioned that different classes of nuts have different nut thickness see 7. Additional tests of individual shipments of material are not ordinarily contemplated.


Hex nuts made to the requirements of DH3 shall a563n marked with the symbol HX3 on one face. 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. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition see 5.


It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. Threads of nuts tapped prior to zinc coating 4. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Please fill this form, we will try astmm respond as soon as possible.

Originally approved in For smaller quantities A Gr.

Heat analysis Product analysis Molybdenum: Zinc-coated nuts are nuts intended for use with externally threaded fasteners which are not asgm zinc-coated, mechanically zinc-coated, or have a plating or coating of sufficient thickness to necessitate overtapping the nut thread to provide assembiability. Heat analysis Product analysis Manganese: Class 10 nuts are made of carbon or alloy steel conforming to chemical composition requirements given in Table 1, and are heat treated as specied in 4.

Heat analysis Product analysis Sulfur: A5633m Recommended nut class and style.

Number of Tests 9. NOTE 7—The proof load of a nut is the axially applied load the nut must withstand without thread stripping or rupture. Nickel or molybdenum may be used.

Heavy Hexagon Nuts ASTM AM

NOTE 3—An example of an ordering description follows: The two identifications shall preferably be in different locations and, when on the same level, shall be separated by at least two spaces. Slotted hex nuts are not normally proof load tested. Heat analysis Product analysis Chromium: Materials and Manufacture 4. Historical Version s – view previous versions of standard. NOTE 5—Examples of ordering descriptions are: This abstract is a brief summary of the referenced standard.

  EM 385-1-97 PDF

When this heat treatment is used, particular attention shall be paid to the requirements in 6. Size px x x x x Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Please copy and paste this embed script to where you want to embed Embed Script.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. C26 C26 C26 C26 C26 max Number of Tests 9. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five aztm and if not revised, either reapproved or withdrawn. See Guide G for methods of estimating the atmospheric corrosion resistance of low alloy steels.

However, if markings are located on the bearing surface, they shall be depressed.

Materials and Manufacture 4.