1)The dimensions standard of the fastener.
    Specify the basic dimensions of the fasteners,including the basic thread size, thread ending, shoulder distance,undercutting and chamfering, male thread parts of the end size and other aspects.

2)Technical standard of standard fasteners.In particular, it includes the following aspects:
a)Tolerance standards: the specific provisions of the size tolerance and geometric tolerance.
b)The mechanical properties.
c)Surface defects in the standard: the specific provisions of the product surface defects and the specific requirements of the types of content.
d) Surface treatment standards: the specific provisions of the product surface treatment types and specific requirements and other aspects.
e)Testing standards: specify the various performance requirements.

3) Fastener inspection, marking and packaging standards: the specific provisions of the product factory inspection and acceptance of the project quality standards and sampling programs, as well as product labeling methods and packaging requirements.

4)Labeling methods of the standard: specific provisions of the product integrity labeling methods and simplified labeling methods.

5) Other aspects of fasteners standards: such as terminology standards, the standard weight and so on.