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gb31.3-1988
gb31.3-1988, Total:2 items.
In the international standard classification, gb31.3-1988 involves: Fasteners.
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, gb31.3-1988
- GB 31.3-1988 Hex Head Screw Bolts with Holes Fine Pitch A and B Grades
- GB/T 31.3-1988 Hexagon bolts with split pin hole on shank--Fine pitch thread--Product grade A and B