GB/T 6563-2014 specifies key technical parameters such as size, material and mechanical properties of hexagonal head self-extruding screws to ensure that products meet the requirements of national standards.
Through a specific manufacturing process, the screw can self-form a tight fit thread during tightening, improving connection strength and sealing.
Inspection rules: Specify the sampling method and receiving conditions to ensure that each batch of screws can meet the specified standards.
Marking, packaging, transportation and storage: Standards also address product identification, packaging, transportation and storage conditions to ensure the quality and safety of products in circulation and use.