hex flange nut STANDARD:DIN 6923, ANSI 182.2.2 FLANGE NUT, BSW FLANGE NUT. 1)different types of hex flange nut2)standard:DIN 6923, ANSI 182.2.2 FLANGE NUT, BSW FLANGE NUT. 3)class: 4,6,8,104)surface:plain, black,H.D.G,ZINC,DACROMET5)material: stainless steel ,alloy steel,carbon steel6)package:bulk packing,small boxes,pocket. hex serrated flange nut