3/8-12X1 Slotted Indented Hex Washer Self Tapping Screw Type AB Fully Threaded Zinc (Pack Qty 500) BC-3716ABSW

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 1/4-20X5/16 Phillips Flat Undercut Machine Screw Fully Threaded Zinc (Pack Qty 6,000) BC-1405MPU.