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Fastener Standards for Nuts

Fastener standards for nuts cover multiple kinds of self-locking nuts, as well as a similar range of hex nuts. Additionally, standards have been developed to address test methods, surface discontinuities, mechanical and material properties, and the properties of nuts to be used in specific applications. Both inch and metric nuts are covered.

Please click on the category below that best fits your needs.

Hex Nut Standards

These standards from ANSI, ASME, ISO, SAE, and others address the materials, construction, and requirements for hex nuts for a variety of applications.

Other Nut Standards

Other standards for nuts including General Nut Standards, Nut Surface Discontinuities, Nut Mechanical and Material properties, Test Methods for Nuts, Other Nut Standards, and Nut Standards for Specific Applications


As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.