Hexagon flange bolt We can supply them as per different standards and customer' requirements. Name: Hexagon flange boltStandard : GB,DIN,ANSI/ASME,non-standard.Finish : Plain, ZP,BZP,YZP,BO,H.D.G.,Dacromet and ets.Grade : from 8.8 to 12.9Material : carbon steel and alloy steel,, hexagon flange bolt