Type:DIN931/Grade A and B Size:M3~M56 Class:Gr4.8-12.9 Coating:Plain,Black,Zinc Yellow,HDG,Dacromet, etc Description: Hexagon Head BoltsType:DIN931/Grade A and BSize:M3~M56Class:Gr4.8-12.9Coating:Plain,Black,Zinc Yellow,HDG,Dacromet, etcPacking:Box packing,Poly bag packing,as per customer requirement Hexagon Head Bolts