Discount Distributors offers square drive deck screws in 316 (salt water resistance) stainless steel in various sizes 1-1/4" length, 2-1/2" length and 3" length. More sizes available upon request. Deck screws are most commonly used to fasten wood and composite decks to main beams. These stainless-steel square head decking screws resist corrosion, so they are a perfect fastener for outdoor decks, since they can withstand a variety of exterior stresses and weather conditions. With our wood screw products, you can easily and efficiently build whatever type of outdoor structure best suits your lifestyle.