Features: 1) Types: DIN1587, JIS1183, GB923 2)Size: M4-M20 3) Material: low/medium carbon steel, Name: Cap nuts (DIN1587,JIS1183,GB923)Size ... nuts(DIN985,DIN982) IFI Nylon lock nuts(IFI 100) Domed Cap nuts(DIN1587, JIS1183, GB923) Weld nuts(DIN928, DIN929, JIS1196) Flange ... nuts(DIN557) Hex coupling nuts(DIN6334) Tee nuts K-nuts Cap Nut (DIN1587,JIS1183,GB923)