Pro-Twist CB1581 Screw, #8 Thread, 1-5/8 in L, High-Low Thread, Wafer Head, Phillips Drive, Twin Lead Point, 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 Phillips recess or T-20 star drive. Exterior coated.