This standard specifies the general technical conditions applicable to standardized bolts, screws and nuts, and also recommends the use of non-standard fasteners. It specifies national standards that can be referenced in technical requirements such as tolerances, mechanical and functional properties, geometric properties, surface defects and quality conditions.
GB/T 16938-2008 Referenced Document
GB/T 197 General purpose metric screw threads—Tolerances*, 2018-03-15 Update
GB/T 2 Fasteners.Ends of parts with external thread*, 2016-02-24 Update