9 x 1-5/8 Big T Trim Head Wood Screw, Coated, Trim Head, T-20, Bronze

9 x 1-5/8 in. Big Timber Trim Head Wood Screws, Coated, T-20, Bronze

Big Timber Exterior Corrosion Resistant Trim Head Wood Screws are designed for reliable fastening in a wide range of interior and exterior wood construction, remodeling, and repair applications. These 9 x 1-5/8 in. screws feature heat-treated hardened steel for high tensile and shear strength, along with a triple-layer ACQ-compatible bronze coating for added corrosion resistance.

The trim head design provides a clean, low-profile appearance while the self-countersinking head and under-head cutting nibs help the screw seat neatly into wood. The T-20 deep six-lobe star drive delivers secure bit engagement, helping reduce cam-out and allowing higher torque during installation.

Key Features and Benefits

• Heat-treated hardened steel provides high tensile strength and high shear strength for dependable wood fastening.
• Triple-layer bronze coating is ACQ-compatible and suitable for many interior and exterior applications.
• T-20 deep six-lobe star drive improves bit engagement and helps reduce cam-out under load.
• High-torque design handles up to twice the torque of Phillips or square-drive fasteners while helping extend bit life.
• Under-head cutting nibs help the trim head self-countersink for a clean finished surface.
• Precision-cut knurl enlarges the entry hole to reduce splitting and drag while helping draw lumber tightly together.
• V-cut thread notches cut through wood fibers for easier insertion and reduced driving torque.
• Type 17 tip provides faster, more precise starts, helps prevent walking, and often eliminates the need for pre-drilling.
• Aggressive thread design provides strong withdrawal resistance and dependable holding power.
• Trim head features a 0.24 in. head diameter for a smaller, less noticeable finished appearance.

Versatile Wood Construction Applications

These Big Timber trim head wood screws are well suited for professional contractors, remodelers, woodworkers, and DIY projects. Their combination of strength, corrosion-resistant coating, and easy-driving features makes them useful for a variety of general construction and exterior wood applications.

• Exterior and interior wood framing
• Exterior trim boards
• Window and door installation
• Decks and rails
• Siding installation
• Roofing applications
• Porches
• Fencing
• General construction, remodeling, and repair

Important Corrosion-Resistance Considerations

Big Timber Exterior Corrosion Resistant Trim Head Wood Screws are compatible with treated lumber for many applications. However, bronze-coated fasteners are not intended for every highly corrosive environment. For projects located within one mile of saltwater, near swimming pools, exposed to corrosive chemicals, in livestock confinement areas, or in other environments where corrosion is more likely, use the appropriate size, grade, and type of stainless steel fastener as recommended for the application.

Note: Always follow the lumber manufacturer's recommendations when selecting fasteners for treated wood and other specialty materials.

NOTE: Always follow lumber manufacturer recommendations