Drywall screw 1) C1022 material. 2) Black/gray phosphate or black ... we are one of the leading manufacturer of drywall screws in this area.Drywall screws1) Description: Phillips bugle head, coarse thread, fine ... other kinds of nails and screws,such as drywall screw,chipboard screw,self-tapping screw,self-drilling screw,common nails,concreate nails and ...