Looking for screws that will grip your cement board tightly? Look no further than Grip-Rite's No. 8 wire screws! These screws are 1-5/8 inches long and have a Phillips flat head, making them perfect for use with cement board. With a 5000-pack, you'll have plenty of screws to get the job done right. Cement board screw is ideal for fastening fiber cement boards to wood but is also recommended for use with installing lap siding, fiber cement roofing trim and flooring.