SPAX® PowerLags® bring a new level of fastening efficiency and reliability to log home and timber frame construction. Engineered specifically for these demanding wood-to-wood structural applications, SPAX® PowerLags® feature patented thread serrations that eliminate pre-drilling and dramatically increase installation speed. SPAX XWL Series and XTM Series PowerLags® are also code listed and load rated, so you can be assured of the reliability of the assembly. The two head styles available offer job matched performance and aesthetics.


  • No pre-drilling required
  • Code listings ICC-ES ESR-1782
  • Low profile, large diameter head designs provide exceptional draw down of even rogue logs.
  • Deep T-Star Drive provides superior bit engagement and allows for easy backout of the fastener if necessary when the head is countersunk.
  • Patented thread serrations require up to 40% less driving torque to increase installation speed, while helping to prevent cracking in logs.
  • Proprietary coating provides excellent corrosion resistance and prevents staining wet logs.
  • Fastener length stamp on the head provides convenient identification without measuring and aids on-site inspections.
  • Job-site friendly and weather-resistant packaging.
  • German engineered thread technology; American made.

Download SPAX® PowerLags® Flyer PDF (1.04 MB)

 Download ICC-ES Report ESR-1782 PDF (5.76 MB)

Download TER 1711-01 Deck Ledger Attachment – Using SPAX® PowerLag® Fasteners PDF (883 KB)

Download Deck Ledger Attachment – SPAX Technical Bulletin S-1803 PDF Rev 6/18 (547 KB)

Download TER No. 1802-03; 5/16” POWERLAGS For Use In Multi-Ply and Girder Truss Applications (348 KB)

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