hexagon nut standard:DIN 934,936,555,6915,6923,IFID-6,D- ... ,ANSI 18.2.2,UNI5587,5588. 1)different types of hexagon nut2)standard:DIN 934,936,555,439,6915,6923,JIS ... )surface:plain, black,H.D.G,ZINC,DACROMET5)material: stainless steel ,alloy steel,carbon steel6)package:bulk packing,small boxes,pocket. hexagon nut