Detailed Product Description hex head bolt1)metarials:carbon steel alloy steel...2)finishing:plain,black,zinc,H.D.G...3)size:m6-m64,1/4-4'4)package:bulk packing,small boxes,pocket,as your requirement5)standard: din1.DIN 931-2 M42 to M160*6 hexagon head bolts - Product grade B 2.DIN EN 1662 Hexagon bolts with flange - Small series (ISO/DIS 15071:1996,modified) 3.DIN EN ISO 4014 Hexagon head bolts ...