10-12X4 Phillips Full Contour Truss Self Tapping Screw Type A Full Thread Zinc (Pack Qty 600) BC-1064APT

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