Self-threading, ideal for use in sheet metal with pilot hole Oval, flat and pan head Philips ... storage The stainless steel screws in this set are self-threading, ideal for use in sheet metal with pilot hole and won ... screws included in the set have oval, flat and pin heads.Self-threading, ideal for use in sheet metal with pilot holeOval ... (20) 8 x 1 1/4" 320 Piece Stainless Steel Sheet Metal Screw Set