COVID-19 Update:ABC US is an essential supplier to essential businesses in the hardware, construction and building materials channels across the United States and as such, we will continue to operate. We will adhere to requested health standards for our employees and continue to manufacture and supply SPAX® ENGINEERED FASTENERS to serve our essential customers in those respective industries from our facility in Bryan, OH. Visitors will be considered on an appointment-only basis. For any questions, please call 800-443-9602 between 8a-5p EST.

T-Star Washer Head Yellow Zinc PowerLags®


SPAX® PowerLags® offer the largest selection of code-recognized structural wood-to-wood fasteners in the industry. Featuring SPAX® patented thread technology, they require no pre-drilling, and drive faster and easier than conventional lags and other structural lag screws. Yellow zinc coating for use in interior structural applications.

  • No pre-drilling required (1/4" and 5/16")
  • Grade 5 durability
  • Code listings ICC-ES ESR-1782
  • DrJ Technical Evaluation Report (TER No. 1802-03; Multi-ply; LVL Beams and Girder Truss Applications)
  • 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 (T-Star driver bit included)

T-Star Washer Head
The low-profile, large diameter head design provides outstanding clamping force and improved aesthetics. Deep T-Star drive offers excellent bit engagement without requiring a “special” driver bit. Available in ¼”, 5/16”, and 3/8” diameters, and in lengths up to 10”. 

Base Part No.: 358102() or 458102()

For CAD documents, please see Technical Documents.

SizeDrive/Bit SizeThreadAvailable Pkg. Options
Sm. PlasticLg. Plastic1 lb. Box3 lb. Box5 lb. BoxPer PieceContractor PackBulk PailProject PAX
1/4" x 2-1/2"T-30Partial1+5050012
1/4" x 3"T-30Partial1+5050012
1/4" x 3-1/2"T-30Partial1+5050012
1/4" x 4"T-30Partial1+5050012
1/4" x 4-1/2"T-30Partial5050012
1/4" x 5"T-30Partial1+5050012
1/4" x 6"T-30Partial1+5050012
5/16" x 3"T-40Partial1+5025012
5/16" x 3-1/2"T-40Partial1+50250
5/16" x 4"T-40Partial1+5025012
5/16" x 4-1/2"T-40Partial1+50250
5/16" x 5"T-40Partial1+
5/16" x 6"T-40Partial1+
3/8" x 5"T-50Partial1+25150
3/8" x 6"T-50Partial1+2515012
3/8" x 8"T-50Partial150
3/8" x 10"T-50Partial1+150
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