Simpson Strong-Tie S09400FB1 Trim-Head Screw, Square Drive, #9 x 4-in. #2 SQ, Type 305, 1-lb.

• Trim-style head for flush seating and cleaner appearance on decking surfaces
• Square-drive design for easy installation and secure driving
• Type-17 point for fast starts
• Coarse threads on approximately two-thirds of the shank for pulling the decking and other material tightly to the framing
• Driver bit included in each package
• Predrilling recommended near board ends to prevent splitting
• Screw length: 4 in.
• Type 305 stainless steel provides high-level corrosion resistance
• Quantity: 1 lb. per package (approx. 61 screws per lb.)

Ideal for decking applications, the Simpson Strong-Tie trim-head screw features a square drive for secure, slip-free engagement during installation. The low-profile, trim-style head sits flush with the surface, delivering a clean finish. A Type-17 point allows for quick starts, while coarse threads on the lower two-thirds of the shank provide powerful pull-through—drawing deck boards tightly to the joists for a secure hold. Simpson Strong-Tie offers this trim-head screw in stainless steel 6-lobe drive (and painted heads) for hand-drive applications, as well as in collated square-drive versions (with and without painted heads) for the Simpson Strong-Tie Quik Drive auto-feed screw driving systems.

• Trim-style head for flush seating and cleaner appearance on decking surfaces
• Square-drive design for easy installation and secure driving
• Type-17 point for fast starts
• Coarse threads on approximately two-thirds of the shank for pulling the decking and other material tightly to the framing
• Driver bit included in each package
• Predrilling recommended near board ends to prevent splitting
• Screw length: 4 in.
• Type 305 stainless steel provides high-level corrosion resistance
• Quantity: 1 lb. per package (approx. 61 screws per lb.)