SPAX 3/8 x 8in. Interior Structural Wood Lag Screws Powerlags Hex Head Hex (150 EA) Bulk Pail

SPAX Hex Washer Powerlags — The Ultimate Structural Fastener: Delivers unmatched strength, speed, and efficiency for wood-to-wood structural connections. Designed for high-torque applications and features a hex head with a built-in washer for maximum pull-down force, eliminating the need for separate washers. With thread serrations, Powerlags require up to 40% less driving torque, making installation faster and easier while helping to prevent wood splitting.

Perfect for framing, timber construction, log home building, and heavy-duty interior projects, these structural fasteners are IRC/IBC code compliant and stamped for easy length identification. No pre-drilling required for 1/4" and 5/16" sizes, while lead holes are recommended for larger diameters.

Sold in job-friendly pack sizes, including bulk pails, with a hex driver included for convenience. Powerlags are the ideal upgrade from conventional lag screws, offering superior holding power and durability for every project.Main Material: Carbon Steel / Drive Size: 1/2" / Free Bit Included? No / Drive Type: Hex / Head Type: Hex Head / Head Size: 0.748" / Partial Thread / Thread Length: 3.150" / Screw Length: 8" / Screw Width: 3/8" / Finish Coating: Clear and yellow zinc coatings are tested for use in untreated and pressure-treated lumber for above-ground interior dry/damp applications (AWPA UC1-UC2).