SPAX 4191670450804 Construction Screw, #9 Thread, 3-1/4 in L, Partial Thread, Flat Head, T-Star Plus

SPAX multi-purpose construction screws are the versatile fastening solution for a wide range of interior and exterior applications in multiple materials including wood, concrete, masonry, sheet metal, plastic and treated lumber. Proprietary HCR-X coating is approved for use in treated lumber and freshwater environments.