Active standard | Published: 01/03/2026

ASTM A563/A563M-26

Standard Specification for Carbon and Alloy Steel Nuts (Inch and Metric)

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Detail information

Designation: ASTM A563/A563M-26

Publication date: 01/03/2026

Pages: 11

Country: American technical standard

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Anotation

This specification covers chemical and mechanical requirements for eight property classes of hex and hex-flange carbon and alloy steel nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts. 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. Classes 8S3 and 10S3 nuts have atmospheric corrosion resistance and weathering characteristics comparable to those of the steels. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition. When properly exposed to the atmosphere, these steels can be used bare (uncoated) for many applications.

Keywords:
alloy steel, carbon steel, nuts, steel, weathering steel ,, ICS Number Code 21.060.20 (Nuts)

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