SPAX® Hex Washer Head Zinc PowerLags®

Base Part #: 357101() and 457101()

Choose SPAX® Hex Washer Head PowerLags®, a wood screw that provides maximum driver engagement, especially when using larger diameter/longer length parts in harder wood species. A great interior wood screw for wood-to-wood fastening. Available in ¼”, 5/16”, 3/8”, and ½” diameters, and in lengths up to 12”. Buy SPAX Hex Washer Head PowerLags wood screws with zinc coating in bulk pails from wholesalers, dealers, and specialty distributors or in job-friendly package quantities (hex driver included) at retail hardware and home improvement stores.

SPAX® PowerLags®

SPAX PowerLags feature patented thread technology and requires no pre-drilling. Our PowerLags offer the largest selection of code-recognized structural wood-to-wood fasteners in the industry. These exceptional fasteners drive faster and easier than conventional lags and other structural lag screws. Available in hex head with zinc coating for use in interior applications.

  • No pre-drilling required (1/4" and 5/16")
    Note: Lead holes of 11/64" (0.172") diameter is required for 3/8" and 13/64" (0.203") diameter is required for 1/2" POWERLAGS
  • Grade 5 durability
  • IRC / IBC Code Compliant DrJ TER No. 1912-07 Structural Fastener Properties
  • 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
  • Sold in job-friendly package quantities, including bulk pails (Hex driver included)

Choose SPAX PowerLags structural wood to wood screws with built-on washer design on your project. Request a sample pack of SPAX PowerLags today and build strong connections on the job site. Need something stronger? Shop our PowerLags collection designed for timber frame and log home construction.

For CAD documents, please see Technical Documents.

SizeDrive/Bit SizeThreadAvailable Pkg. Options
Retail PaxLarge Retail Pax1 lb. Box3 lb. Box5 lb. BoxIndividualProject PaxContractor PaxMini PailBulk Pail
1/4" x 2"3/8" HexPartial1+50500
1/4" x 3"3/8" HexPartial1+50500
1/4" x 3-1/2"3/8" HexPartial1+50500
1/4" x 4"3/8" HexPartial1+50500
1/4" x 4-1/2"3/8" HexPartial1+50500
1/4" x 5"3/8" HexPartial1+50500
1/4" x 6"3/8" HexPartial1+50500
5/16" x 3"7/16" HexPartial50250
5/16" x 4"7/16" HexPartial1+50250
3/8" x 5"1/2" HexPartial1+25150
3/8" x 6"1/2" HexPartial1+25150
3/8" x 8"1/2" HexPartial1+150
1/2" x 5"5/8" HexPartial1+25100
1/2" x 6"5/8" HexPartial1+25100
1/2" x 8"5/8" HexPartial100
1/2" x 10"5/8" HexPartial100