Stainless steel flat head double lock screw for exterior use. 1 lb bag (approx 72pc). #2 square drive. Suitable for marine and industrial applications where corrosion resistance is important. Spax is now producing these screws with torx drive...the remaining square drive inventory is being offered at close out pricing. Only 2 lbs left in stock.

While stainless steel offers the ultimate surface protection, it does not have the shear strength of a comparable carbon steel fastener with a zinc coating. I would not recommend these for structural applications...they are great for decks, rails and sheathing.