Spax PowerLags structural screws are heat treated for strength and durability and require no predrilling for ¼- and ⁵⁄₁₆-inch diameters. According to the manufacturer, the thread serrations require less driving torque than those of similar screws. The built-on washer head eliminates the cost of a separate washer while the fastener-length stamp on the head provides convenient identification without measuring and aids on-site inspections. PowerLags come in hex and T-star head styles with zinc, yellow zinc, and HCR coatings. A 500-count pail of ¼-by-2½-inch T-star washer head HCR PowerLags costs about $95. spax.us
Durable Structural Screws
