... , full thread etc.2.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 , etc.3.Drive ... , specializing in the production of CNC/AUTO lathe, springs, shafts, screws, stamping parts and other metal parts. Our main production modes ...