... :DIN,ASME/ANSI,BSW,ISO,JIS Our mostly products are stainless steel standard fasteners, you can choose mainly materials between 200, 201 ... ,202, 304 , 316Our mostly products are stainless steel standard fasteners, you can choose mainly materials between 200, 201 ... , heavy nuts, nylon lock nuts, flat washers, spring washers etc. Stainless steel hex nut