Standard By:ASTM International, 11/01/2013

Published:2013-11-01

Pages:8

File Size:1 file , 110 KB

Note:This product is unavailable in Russia, Ukraine, Belarus

1.1This 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.

Note 1–Throughout this specification, the term class means property class.

Note 2–Requirements for the four classes 5, 9, 10, and 12 are essentially identical with requirements given for these classes in ISO 898/II. Requirements for Classes 8S and 10S are essentially identical with requirements in an ISO 4775 Hexagon Nuts for High-Strength Structural Bolting with Large Width Across Flats, Product Grade B, Property Classes 8 and 10. Classes 8S3 and 10S3 are not recognized in ISO standards.

1.2Classes 8S3 and 10S3 nuts have atmospheric corrosion resistance and weathering characteristics comparable to those of the steels covered in Specification A588/A588M. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition (see 6.2). When properly exposed to the atmosphere, these steels can be used bare (uncoated) for many applications.

1.3The nut size range for which each class is applicable is given in the table on mechanical requirements.

1.4Appendix X1 gives guidance to assist designers and purchasers in the selection of a suitable class.

1.5Appendix X2 gives data on the properties of slotted hex nuts and hex jam nuts.

1.6The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

Note 3–This specification is the metric companion of Specification A563.