For pocket-hole joinery in exterior applications, we offer these corrosion-resistant screws made of either triple-coated steel or 305 stainless steel. Both are suitable for natural and ACQ-treated lumber, but in especially harsh conditions, the stainless-steel screws offer superior long-term corrosion resistance.
The washer-style heads have a large surface area to help reduce over-compression of wood pockets. The 1 1/4" stainless-steel screws are also available with a fine thread for use in hardwood. All have self-tapping tips and square-recess heads.