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Fastener national standard.
Apr 15, 2018

1. Standard for the dimension of fastener products: specify the contents of the basic dimensions of the product; Threaded products, including the basic dimensions of the thread, the end of the thread, the shoulder distance, the back of the knife slot and the end dimensions of the outer thread parts, etc.

2. Standard for technical conditions of fastener products. It mainly includes product tolerances, mechanical properties, surface defects, surface treatment, product testing standards and corresponding specific provisions.

3, screw product acceptance check, marks and packing standard: specific provision of qualified products factory acceptance sampling project quality and sampling plan, method and product logo and packaging requirements.

4. Standard parts, fasteners, screws, screw marking method standards: specific provisions on the product integrity labeling method and simplified marking methods.

5. Standards for other aspects of fasteners: standards for fastener terminology, standard for fastener products, etc.


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