Hex heavy nut and nylon jam nut We can supply them according to different standards and customer's requirement. Name : hex heavy nut and nylon jam nutStandard : ANSI/ASME, DIN,ISO,GB..Grade: From 2 to 10Finish : Plain, ZP,YZP,BZP,BO,HDG,Dacromet and etc. hex heavy nut and nylon jam nut