#10 x 1-1/2" Flat Head Deck Screws Square Drive Silicon Bronze

#10 x 1-1/2" flat head deck screws in silicon bronze, with a square drive (Robertson) recess that resists cam-out. The 82° flat (countersunk) head sits flush with the board surface. It has a sharp gimlet point (the standard wood-screw point); pre-drill in hardwood. The coarse thread runs partway up the shank, so the board pulls down tight to the framing. Silicon bronze is the traditional choice for boat building and for cedar and redwood, and it weathers to a warm brown tone. Sold in production-volume bulk packs.