... insert lock nut Material :A2.A4.SUS201.304.316 Standard:DIN934 OUR FASTENER ARE MADE OF STAINLESS STEEL,DIFFERENT TYPES ... DIN, American Standard ANSI, JIS international standard ISO and other products, are widely used in petroleum, chemical, food, ... health, environmental protection equipment, electronic appliances, furniture and other areas, products are sold throughout the world. Stainless steel ...