SPAX® PowerLags® T-Star Washer Head, Interior Construction Screws, Yellow Zinc
Choose SPAX T-Star Washer Head Interior Construction PowerLag Screws. The low-profile, large-diameter design provides outstanding clamping force and improved aesthetics. Deep T-Star drive offers excellent bit engagement without requiring a “special” driver bit. Available in 1/4”, 5/16”, and 3/8” diameters and in lengths up to 10”. Yellow zinc coating for use in interior structural applications. Buy SPAX T-Star Washer Head PowerLags and interior construction screws in bulk pails or in job-friendly package quantities (hex driver included) from wholesalers, dealers, and specialty distributors or retail hardware and home improvement stores near you.
Description
SPAX® T-Star Washer Head construction fasteners with yellow zinc coating are intended for interior structural wood-to-wood connection applications. These fasteners are designed with a low profile large diameter wafer head for applications requiring additional surface area under the head for superior pull-down force. Ideal for framing attachment and multi-ply beam applications.
Materials & Coating
Cold-rolled “carbon steel” wire, heat treated to grade 5 durability and plated with a yellow zinc finish to prevent red rust. “Yellow zinc” is tested and recognized for use in above ground contact pressure treated lumber for interior dry/damp general construction applications (e.g. AWPA UC1-UC2).
SPAX® POWERLAGS®
SPAX PowerLags with built-on washer design is available in a variety of screw styles, including Hex head, T-Star, and multiple coating options. Our interior and exterior construction screws require no pre-drilling and drive faster and easier than conventional lags and other structural lag screws. We offer the largest selection of code-recognized structural wood-to-wood fasteners in the industry.
- IRC / IBC Code Compliant DrJ TER No. 1912-07 Structural Fastener Properties
- DrJ Technical Evaluation Report (TER No. 1802-03; Multi-Ply; Sawn lumber assemblies and engineered wood - LVL, PSL and LSL assemblies)
- Grade 5 durability
- No pre-drilling required (1/4" and 5/16")
Note: Lead holes of 11/64" (0.172") diameter are required for 3/8" - 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
Choose SPAX PowerLags structural wood to wood screws for interior and exterior applications. 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.
TYPICAL INTERIOR APPLICATIONS
• Multi-ply engineered wood (LVL, PSL, LSL) assemblies
• Multi-ply sawn lumber assembly
• Interior framing applications
• Shelving applications — interior buildings
• Indoor furniture
For CAD documents, please see Technical Documents.
| Size | Drive/Bit Size | Thread | Available Pkg. Options | |||||||||
| Retail Pax | Large Retail Pax | 1 lb. Box | 3 lb. Box | 5 lb. Box | Individual | Project Pax | Contractor Pax | Mini Pail | Bulk Pail | |||
| 1/4" x 2-1/2" | T-30 | Partial | 1+ | 12 | 50 | 500 | ||||||
| 1/4" x 3" | T-30 | Partial | 1+ | 12 | 50 | 500 | ||||||
| 1/4" x 3-1/2" | T-30 | Partial | 1+ | 12 | 50 | 500 | ||||||
| 1/4" x 4" | T-30 | Partial | 1+ | 12 | 50 | 500 | ||||||
| 1/4" x 4-1/2" | T-30 | Partial | 1+ | 12 | 50 | 500 | ||||||
| 1/4" x 5" | T-30 | Partial | 1+ | 12 | 50 | 500 | ||||||
| 1/4" x 6" | T-30 | Partial | 1+ | 12 | 50 | 500 | ||||||
| 5/16" x 3" | T-40 | Partial | 1+ | 12 | 50 | 250 | ||||||
| 5/16" x 3-1/2" | T-40 | Partial | 1+ | 50 | 250 | |||||||
| 5/16" x 4" | T-40 | Partial | 1+ | 12 | 50 | 250 | ||||||
| 5/16" x 4-1/2" | T-40 | Partial | 1+ | 50 | 250 | |||||||
| 5/16" x 5" | T-40 | Partial | 1+ | |||||||||
| 5/16" x 6" | T-40 | Partial | 1+ | |||||||||
| 3/8" x 5" | T-50 | Partial | 1+ | 25 | 150 | |||||||
| 3/8" x 6" | T-50 | Partial | 1+ | 12 | 25 | 150 | ||||||
| 3/8" x 8" | T-50 | Partial | 150 | |||||||||
| 3/8" x 10" | T-50 | Partial | 1+ | 150 | ||||||||
PowerLags T-Star Washer Head Yellow Zinc Specification Sheet (3 MB)
SPAX POWERLAGS Engineering Product Submittal (4 MB)
DrJ TER No. 1912-07 POWERLAGS Fastener Properties 7-27-2022 (819 KB)
DrJ TER No. 1802-03 Rev 8-18-2023 Multi-Ply (Sawn Lumber and Engineered Wood: LVL, LSL and PSL) (569 KB)
SPAX Bit Center Options (901 KB)
1/4”(.250) Washer Head T-Star PowerLags 2-D Screw Size Reference Drawing (PDF) (257 KB)
1/4”(.250) Washer Head T-Star PowerLags Full Scale CAD Files (PDF) (112 KB)
1/4”(.250) Washer Head T-Star PowerLags Full Scale CAD Files (DWG) (150 KB)
1/4”(.250) Washer Head T-Star PowerLags Full Scale CAD Files (DXF) (613 KB)
5/16”(.312) Washer Head T-Star PowerLags 2-D Screw Size Reference Drawing (PDF) (267 KB)
5/16”(.312) Washer Head T-Star PowerLags Full Scale CAD Files (DWG) (215 KB)
5/16”(.312) Washer Head T-Star PowerLags Full Scale CAD Files (DXF) (1 MB)
5/16”(.312) Washer Head T-Star PowerLags Full Scale CAD Files (PDF) (133 KB)
3/8”(.375) Washer Head T-Star PowerLags 2-D Screw Size Reference Drawing (PDF) (261 KB)
3/8”(.375) Washer Head T-Star PowerLags Full Scale CAD Files (PDF) (103 KB)
3/8”(.375) Washer Head T-Star PowerLags Full Scale CAD Files (DWG) (125 KB)
3/8”(.375) Washer Head T-Star PowerLags Full Scale CAD Files (DXF) (465 KB)