... Equipment and Skilled Technicians 2)High Quality Raw Material 3)Strict Testing Process and Management SpecificationsHex Nuts DIN934 1.Class 6 /Class 8 ... Surface: SELF COLOUR, BLACK,ZP,YZP,H.D.G, DACROMETMaterials:High Quality Carbon Steel (C1015,C1035,C1045etc)Alloy Steel:20 MnTiB 40Cr ... :AS1112,BS1083,BS1768,IFI D-5,D-8,UNI5587,SQUARE NUTS,TEE NUTS