Big Timber SWD10318-350 Exterior Wood Screw, #10 Thread, 3-1/8 in L, Bugle Head, 6-Lobe, Star Drive, Type 17 Point

Compatible with treated lumber, but areas within one mile of saltwater, near swimming pools, exposure to corrosive chemicals or other areas where corrosion is more likely to occur, such as livestock confinement. Use the proper size, grade and type of Big Timber stainless steel fasteners.

Features:

• Heat treated hardened steel for high-tensile strength and high shear strength
• Triple layer ACQ compatible bronze coating for exterior or interior use
• Deep six-lobe star drive recess reduces cam out end load
• Handles 2X the torque as Phillips or square drive while extending the life of the bit
• Under head cutting nibs to aid in self-countersinking