The stainless steel fasteners 1.Standard: ASTM / ASME SB 160 2.marerial:high quality material 3.certificate:ISO9001:2000 stainless steel ... (SS 316), B 8 T (SS 321), A 2, A 4, • Standard: ASTM / ASME SB 160 / 164 / 425 / 166 / 446 / 574 / 472 ... GR. • Grade : B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M titanium fasteners