Spax PowerLags 5/16 In. x 4 In. Hex Head Exterior Structure Screw (250 Ct.) Fastenmaster while allowing water vapor to

while allowing water vapor to pass through it

Graphite Grey

Excellent UV (ultraviolet) resistance

No electricity is required

Made of SPF (spruce

Spax PowerLags 5/16 In. x 4 In. Hex Head Exterior Structure Screw (250 Ct.) Fastenmaster while allowing water vapor toSpax PowerLags Screws have a hex head with integrated washer and HCR (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 eliminate pre drilling and dramatically increase installation speed requiring up to 40% less driving torque to increase installation