1. Standards for fastener product dimensions: specifying the basic dimensions of the product; Threaded products also include basic dimensions of threads, thread ending, shoulder distance, tool groove and chamfer, and end dimensions of externally threaded parts.

2. Standards for technical specifications of fastener products. This mainly includes the standards and corresponding specific regulations for product tolerances, mechanical properties, surface defects, surface treatment, and product testing.

3. The standards for acceptance inspection, labeling, and packaging of screw products: specifically stipulate the qualified quality level and sampling plan of spot checks during product factory acceptance, as well as the content of product labeling methods and packaging requirements.

4. Standard marking methods for standard parts, fasteners, screws, and screws: Specific regulations on the complete marking methods and simplified marking methods for products.

5. Standards for other aspects of fasteners, such as fastener terminology standards, fastener product weight standards, etc.