Spax 4 in. PowerLags Washer Head Construction Screws, Pack of 50

<p>Featuring patented thread technology, they require no pre-drilling and drive faster and easier than conventional lags and other structural lag screws. </p><b>Features</b><ul><li>No required pre-drilling in wood be more efficient on the job by eliminating time consuming steps with self-drilling spax</li><li>Patented thread serrations require up to 40% less driving torque to increase installation speed while helping prevent cracking in logs</li><li>Built-on washer head designs eliminate the need and extra cost of a separate washer</li><li>Fastener length stamp on the head provides convenient identification without measuring and aids on-site inspections</li><li>T-star washer head offers a low-profile option for outstanding clamping force with improved aesthetics</li><li>Faster &amp; easier installation</li><li>Pack of 50</li></ul><b>Specifications</b><ul><li><b>Length:</b> 4 in.</li><li><b>Head Type:</b> Washer Head</li><li><b>Driver Bit Included:</b> Yes</li><li><b>Diameter:</b> 0.25 in.</li><li><b>Self Drilling:</b> Yes</li><li><b>Color:</b> Gray</li><li><b>Application:</b> Wood</li><li><b>Grade:</b> 5 Grade:</li><li><b>Indoor or Outdoor:</b> Outdoor</li><li><b>Finish:</b> High Corrosion Resistant</li><li><b>Material:</b> Steel</li><li><b>Thread Type:</b> Serrated</li><li><b>Drive Size:</b> T-30</li><li><b>Thread Length:</b> 2.375 in.</li><li><b>Head Height:</b> 0.097 in.</li><li><b>Head Outer Diameter:</b> 0.697 in.</li><li><b>Weight:</b> 1.95 lbs</li></ul>- SKU: ZX99ACHR154548