fastener

Introduction

Fasteners are also referred to as standard parts in the market, and are a general term for a type of mechanical parts used when two or more parts (or components) are fastened and connected to one another. 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. Standards of fasteners in terms of size: Specifies the basic dimensions of the product. Threaded products also include the basic dimensions of the thread, thread finish, shoulder spacing, undercuts and chamfers, and end of externally threaded components. Dimensions and other aspects of the content of 2, fasteners, technical conditions of the product standards. Specific include the following aspects of the standard: a) fastener product tolerance standards: specify the size of the product tolerances and geometric tolerances. b) Standards for the mechanical properties of fasteners: Specifies the marking method for the mechanical properties of the product and the contents of the mechanical performance items and requirements; some fasteners change the content of the fastener to the material properties or working performance of the product. 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: Specify the type of surface treatment and specific requirements of the product. e) Standards for the testing of fastener products: Specify the contents of the above-mentioned various performance requirements for testing. 3, fastener product acceptance 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.