Every stainless steel screw product involves many standards. In general, a stainless steel screw product involves the following standards.
(1) Standards in size - specifically including the basic dimensions, dimensional tolerances and row tolerances of stainless steel screws; threaded fastener products, including basic dimensions and tolerances of threads, and provisions for the end of externally threaded parts And so on.
(2) Standards for mechanical properties - specifically including marking methods for performance levels and specific mechanical performance requirements.
(3) Standards on surface defects - specifically including the types and requirements of surface defects of products;
(4) Standards for surface treatment - specifically including the type of surface treatment of the product and the specific requirements of the surface treatment;
(5) Standards for acceptance inspection, marking and packaging of fasteners - specifically including the relevant provisions of the spot inspection items, qualified quality levels and sampling plans, and the contents of the product identification and packaging. The relevant provisions;