... all sizes.2. Treatment:cold forging/hot forging3.Materials option: Stainless Steel C276, 904L, 304, 304L,310S, 316, 316L, 321, 317L, 2507 ... , 254SMO, AL6XN, 1.4501,1.4529,Monel400,Zeron100.Super duplex stainless steel F55, F51,F53 HastelloyB&C, Inconel, Incoloy ,GH etc.4 ... States, Germany, Saudi Arabia, South Korea,etc. GH2132/ A286 Super Alloy stainless steel fastener hex bolt & nut M6-M64