Stainless steel ( A2 SUS304 & A4 SUS316 ) DIN931,933,ISO4014,4017,DIN603, A10,A325,A490. DIN912,ISO7380, DIN571, Self-drilling screws and self-tapping screws,and some ANSI ASTM bolts screws DIN934,ISO4032, DIN439, DIN982,DIN985,DIN6923,DIN1587,DIN315,DIN557 DIN975 Produce A2 SUS304 & A4 SUS316 drawing bolts,nuts.