Pro-Twist CB1585 Screw, #8 Thread, 1-5/8 in L, Wafer Head, Phillips Drive, Steel

Designed to fasten cement board to wood or light gauge steel studs (25 to 20). Wafer head with nibs allow it to countersink into the board. The sharp point penetrates the board without cracking it and high-low threads ensure high withdrawal resistance. #2 reduced Philips recess or T-20 star drive. Exterior coated.