8-15X1 1/4 Combination (Slotted/Phil) Pan Head Self Tapping Screw Type A Full Thread Zinc (Pack Qty 4,000) BC-0820ACP

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 Steel: Rockwell C45 minimum