Common industry standards for stainless steel fasteners

1) Stainless steel fastener product size standards: specify the content of the basic size of the product; products with threads also include the basic size of the thread, thread end, shoulder distance, undercut and chamfer, and the size of external threaded parts End size and other aspects.

2) Not standard on product technical conditions. Specifically, it includes the following standards:

a) Tolerance standards for fasteners: specify product size tolerances and geometric tolerances.

b) Fastener product mechanical performance standards: specify the marking method of product mechanical performance levels and the content of mechanical performance items and requirements; some fastener products change this content to product material performance or work performance Aspect content.

c) Standards for fastener product surface defects: specify the types of product surface defects and specific requirements.

d) Surface treatment standards of fastener products: specify product surface treatment types and specific requirements.

e) Standards for the test of stainless steel fastener products: specify the test contents of the various performance requirements mentioned above.

3) Standards for product acceptance inspection, marking and packaging of stainless steel standard parts: specify the qualified quality level and sampling plan of the random inspection items during the factory acceptance of the product, as well as the content of the product marking method and packaging requirements.

4) Standards on the marking method of fastener products: specify the complete marking method and simplified marking method of the product.

5) Other standards of stainless steel fasteners: such as the standard of fastener terminology, the standard of fastener product weight, etc.