Fastener Products Involve Standards For Several Aspects.

Fasteners are also called screws, and the name is different, but the inner meaning is the same. Each type of tightening fastener is a general term for a type of mechanical part used when fastening two or more parts (or members) into one piece. Fastener products involve standards for several aspects.

1. Standards for fastener product size: specify the basic dimensions of the product; threaded products, including the basic dimensions of the thread, thread finish, shoulder distance, undercut and chamfer, end of externally threaded parts Dimensions and other aspects.

2. Standards 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. Standards for inspection, marking and packaging of screw products: specify the quality level and sampling plan of the project, and the content of the product marking method and packaging requirements.

4. standard parts, fasteners, screws, screws marking method standards: specify the product complete marking method and simplified marking methods.

5. Other aspects of fasteners: standards such as fastener terminology, standards for fastener product weight, etc.