... special stainless steel BOLT, NUT, WASHER and other fasteners. Material: SS304, SS316, SS316Ti, SS316L, SS317L, SS321\SS347\SS347H\SS310S \2520, super stainless steel ... Monel400, Hastelloy series (B \ C-22 \ C-276), and Duplex steel series (2205(F51\S31803\S32205), 2507(F53\S32750) ,NIMONIC80A\105 ...