... Head type: Hexagon head, Mushroom head, Pan head, Countersunk head,Bugle head, Oval head, Hex flange head, Button head,Triangular head , Round head, Ball head ,Spherical Cheese Head,Hexagon socket head ... Ni-plating, Cr-plating, Tin-plating, copper-plating, the wreath oxygen resin spraying, the ... .814.417.1s810131516182127 STEEL HEXAGON SOCKET HEAD BOLTS DIN912ATANDARD:DIN912 /ISO4762SIZE:M3--M24GRADE ...