1.factory directly 2.supply s.s hexagon flange bolt 3.small order accept 4.Have in stock 1. ... nuts with all sizes are also available. 2.Materials option: Stainless Steel C276, 904L, 304, 304L,310S, 316, 316L, 321, 317L, 2507 ... , 2205, 254SMO, AL6XN, 1.4501,1.4529.Super duplex stainless steel F55, F51,F53 HastelloyB&C, Inconel, Incoloy etc. 3.Standards ...