5/16-12X1 1/2 Unslotted Ind Hex Washer 7/16 A/F Self Tap Screw Type A B Full Thread Zinc (Pack Qty 1,000) BC-312407ABW

For self starting in thin (.015-.050 thick) metal or resin-filled plywood. Recommended over a Type-A, particularly in brittle materialsYou may also like 3/8-24X1 1/2 Fine Thread Socket Head Cap Screw Black DFAR (Pack Qty 100) BC-3824CSP.