8-15X1 1/4 Phillips Wafer with Nibs High Low Screw Full Thread Sharp Point Ceramic Green (Pack Qty 1,000) BC-0820HWAFSRC

For attaching cement board to wood studs. Screw should embed itself into the wood material at least 1/2 inch AISI 1018-1022 or equivalent steel. Screws shall be quenched in liquid and then tempered by reheating Vickers HV 450 minimum