8-15X1/2 Phillips Round Washer Self Tapping Screw Type A Fully Threaded Black Oxide (Pack Qty 10,000) BC-0808APRWB

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