#10 x 2-1/2" Bugle Deck Screws Square Drive Stainless Steel 305

#10 x 2-1/2" bugle head deck screws in 305 stainless steel, with a square drive (Robertson) recess that resists cam-out. The bugle head has a curved underside that seats into the board without tearing the surface fibers. The Type 17 point has a cutting notch that drills its own pilot as it goes, which reduces splitting near board ends. The coarse thread runs partway up the shank, so the board pulls down tight to the framing. 305 is an 18-8 family stainless with extra nickel for cold forming; it resists corrosion outdoors and will not stain cedar or redwood. Sold in production-volume bulk packs.