8-15X1 1/4 Phillips Round Washer Self Tapping Screw Type A Fully Threaded Zinc (Pack Qty 4,000) BC-0820APRW

Screws shall be quenched in liquid and then tempered by reheating to 650°F minimum. They are the screw thread covering the whole length of the screw from tip to head and a pronounced thread hard enough for the intended. A thread forming tapping screw with wider spaced threads than a Type-AB and a gimlet point