Manufacturer and exporter of free running wire thread insert, screw-lock thread insert, blind hole thread insert, plating thread insert; helical thread inserts according to BS, ANSI, DIN, etc; un-notched thread insert; the matched repair kits for wire thread inserts; self-tapping screw thread inserts, key-locked screw thread inserts; oblique notch type metal sealing ring, straight notch type metal sealing ring, linked type metal sealing ring, lapping type metal sealing ring, etc.