Zinc Plating Nickel Self Tapping drilling Screw

The head comes in all tapping screw. There are Round head Tapping screw (semicircle head), flat head tapping screw, round head flange (with pad), flat head flange (with pad), pan head tapping screw, pan head flange (with pad), countersunk head, countersunk head, cylindrical head, spherical cylindrical head, horn head, hex tapping screw, hexagonal flange head, hexagonal flange head (with pad) head, truss head tapping screw. Although there are many types of tapping screws, they all have...