DIN985,DIN982 nylon insert lock nuts Material:carbon steel Class:6,I8I,8 Size:M3--M42 Surface treatment:ZP,Dacromet, DIN985,DIN982 nylon insert lock nutsMaterial:carbon steelClass:6,I8I,8Size:M3--M42Surface treatment:ZP,Dacromet,HDG,etc. DIN985,DIN982 nylon insert lock nuts