... F5, F6, F9, F7, F11, F12, F21, F22 Stainless Steel : 304,304H,304L,310,310 S,321,321H, 316Ti,316H ... ,316L, 347,347H, Duplex Steel , UNS S 31803, 2205 , Super Duplex Steel , UNS S 32750Nickel Alloys : Monel ... Specifications Nominal Pipe Size (NPS)Outside Dia of Flange 'O'Thickness of Flange 'C'Dia of Hub 'X'Length Through ... 57688.936.576143.764144.526128.27-- 904L stainless steel forge flange