8-18X3/8 Slotted Indented Hex Washer Self Tapping Screw Type A B Fully Threaded Black Oxide (Pack Qty 10,000) BC-0806ABSWB

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 1/4-20X1 3/4 Six Lobe Flat Thread Cutting Screw Type F Fully Threaded 18-8 Stainless Steel (Pack Qty 1,000) BC-1428FTF188.