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See Chinese contents: GB/T 3098.5-2016 GB/T 3098.5-2016: Mechanical properties of fasteners -- Tapping screws
This Part of GB/T 3098 specifies the materials, technical requirements and test methods of tapping screws. This Part is applicable to the tapping screws manufactured by carburizing carbon steel, thread specification of ST2.2~ST9.5; and thread conforms to the provisions of GB/T 5280.
