Spax 5028486 4 in. PowerLags Washer Head Structural Screws 12 per Pack - Pack of 5

Featuring patented thread technology they require no pre-drilling and drive faster and easier than conventional lags and other structural lag screws. Features No required pre-drilling in wood be more efficient on the job by eliminating time consuming steps with self-drilling spax Patented thread serrations require up to 40% less driving torque to increase installation speed while helping prevent cracking in logs Built-on washer head designs eliminate the need and extra cost of a separate washer Fastener length stamp on the head provides convenient identification without measuring and aids on-site inspections T-star washer head offers a low-profile option for outstanding clamping force with improved aesthetics Faster & easier installation 12 Per Pack Pack of 5Specifications Length: 4 in. Head Type: Washer Head Thread Type: Serrated Material: Steel Gauge 24 Gauge Driver Bit Included: Yes Diameter: 0.3125 in. Self Drilling: Yes Application: Wood Finish: High Corrosion Resistant Indoor or Outdoor: Outdoor Grade: 5 Grade: Self Tapping Yes Color: Green Drive Size: T-40 Weight: 3.94 lbs - SKU: ACHR154567