High strength bolt, or bolt with high strength, can be called high strength bolt. High strength bolt for bridge, rail, high pressure and ultra high pressure connection
Starting in 2001, the extension screw for 14 years of quality assurance, focusing on the processing of extended screws, iron, stainless steel, copper, aluminum, etc.,
Self tapping screws, English name is Self-tapping screw is in metal or non-metallic materials of pre drilling self tapping drill with female thread of a threaded fastener
