8-18X3/8 Square Truss Self Tapping Screw Type A B Fully Threaded Zinc (Pack Qty 5,000) BC-0806ABQT

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 3/8-16X3 Thumb Screw Plain Fully Thread Zinc (Pack Qty 150) BC-3748T.