Backer-On Cement Board Screw #9 x 1-5/8″ (575 Count)

Backer-On Cement Board Screws are engineered for fast, reliable installation of fiber cement backer boards—such as HardieBacker—to both wood and light-gauge steel studs. The patented serrated head design effortlessly countersinks at any angle, delivering a smooth, flush surface ready for tile or other finishes. These screws meet ANSI standards for cement board fastening and work with any standard impact driver or drill/driver using a T-25 Star drive bit.

Made from hardened, corrosion-resistant steel, each #9 x 1-5/8″ screw provides exceptional holding power and long-term performance in moisture-prone environments. With 575 screws per pack, you’ll have plenty to tackle medium to large-scale projects without constant reordering.

Key Features

• Patented serrated head for clean, flush countersinking
• T-25 Star drive for positive bit engagement
• Ideal for attaching fiber cement backerboard to wood or steel studs
• Meets ANSI standards for cement board installation
• Includes 575 screws per pack