Grip-Rite #8 x 2-1/2-in Bugle-Head Coarse Thread Drywall Screws (#8 x 2-1/2")
Fasteners specifically designed for demanding exterior applications.
Use when maximum corrosion-resistance is desired.
Stainless steel is recommended for cedar and redwood.
Always check local building code and wood manufacturers' requirements as the use of stainless steel may be required.