... can be made as your required 1) chinese manufacturer. 2) high quality with competitive prices nylon insert lock nut , ASME NE ... , C1010, Q195 etcb) class 5, class 8, made from high carbon steel such as C1035, C1045, etc, And with hardened treatment.c ... ) stainless steel SS304 SS316.-3)Surface treatment:plain/self colour, zinc plated ...