fastener

Introduction to Fasteners Fasteners are also called standard parts in the market. They are the general term for a type of mechanical parts that are used when two or more parts (or components) are fastened together to form a whole. It is characterized by a wide variety of specifications, different performance and uses, and a high degree of standardization, serialization, and generalization. Fasteners are the most widely used mechanical basic parts and they are in great demand.

Standard 1, fastener product size standards: specify the basic dimensions of the product; threaded product, also includes the basic dimensions of the thread, thread finishing, shoulder distance, undercuts and chamfers, external thread parts End dimensions and other aspects.

2, the fastener product technical conditions standards. Specific include the following content standards:

a) Standards for fastener product tolerances: Specify the product size tolerances and geometric tolerances.

b) Standards for the mechanical properties of fastener products: The method of marking the mechanical performance grade of the product and the contents of the mechanical performance items and requirements; some fastener products will be changed to the material properties or performance Aspect content.

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

d) Standards for Surface Treatment of Fastener Products: Specifies the type of surface treatment and specific requirements of the product.

e) Standards for the testing of fastener products: The contents of the above-mentioned various performance requirements are specified.

3, fasteners product inspection, marking and packaging standards: specify the product inspection and acceptance of the project quality standards and sampling plans, as well as product marking methods and packaging requirements.

4. Standards for labeling methods of fastener products: specify the complete labeling method and simplified labeling method.

5, fasteners in other aspects of the standard: such as the standard terms of fasteners, fasteners product weight standards.