... 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 ... steel, SS-304, SS-302, Aluminum, Brass, Bronze, medium carbon alloy steel etc.Surface ... 512.814.417.1s810131516182127 STEEL HEXAGON SOCKET HEAD BOLTS DIN912ATANDARD:DIN912 /ISO4762SIZE:M3--M24GRADE ...