zinc plated can be made as your required 1) chinese manufacturer. 2) high quality with competitive prices nylon insert lock nut , ASME NE NTE , din 985 , din 9821) Description:nylon insert lock nut , ASME NE NTE , din 985 , din 982- 2)Physical performance:a) class 2, made from low carbon steel, C1008, C1010, Q195 etcb) class 5, class 8, made from high carbon steel such as C1035, C1045, etc, And ...