SPAX 4581820800765 5/16” x 3" T-Star Drive Washer Head HCR (Exterior) PowerLag Screw (50 Pieces per Box)

Spax PowerLags Screws have a washer head with T-Star Drive and HCR-X (High Corrosion Resistant) exterior coating.Provides a new level of fastening efficiency and reliability to construction.Engineered specifically for demanding wood-to-wood structural applications, PowerLags feature patented thread serrations that elimite pre-drilling and dramatically increase installation speed - requiring up to 40% less driving torque to increase installation speed.Fastener length stamp on the head provides convenient identification without measuring and aids on-site inspections.HCR-X Coating offers superior X-terior corrosion resistance when installed in treated lumber and is tested in coastal construction environments.All Spax PowerLags are building code listed and load rated, ICC-ES ESR-1782.'