1 1/4-7X4 1/4 Coarse Thread Hex Cap Screw Grade 5 Zinc Made in USA (Pack Qty 20) BC-12568CH5O

For self starting in thin (.015-.050 thick) metal or resin-filled plywood. Recommended over a Type-A, particularly in brittle materials Screws shall be quenched in liquid and then tempered by reheating to 650°F minimum