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PowerLags®
ExteriorPowerLags®
HEX HEAD HCR® POWERLAGS® XF
NEW! SPAX® POWERLAGS® XF - Experience faster, cleaner structural wood-to-wood connections with hex head structural screws. Engineered for demanding projects, these innovative fasteners eliminate the need for pre-drilling thanks to SPAX’s advanced 4CUT™ Point. The razor-sharp tip delivers quick starts, reduced splitting, and smooth penetration for efficient installation in both dimensional lumber and large timbers.
POWERLAGS XF hex head screws offer a confident, slip-free fit, ensuring maximum torque and reducing the risk of stripping or cam-outs for a smoother, hassle-free installation.
Choose the HCR® exterior coating for long-lasting protection in treated lumber and harsh outdoor environments—perfect for decks, pergolas, gazebos, landscaping timbers, and outdoor structures. Every POWERLAGS XF screw is carefully heat-treated to achieve an ideal balance of strength and ductility for structural reliability.
Available in: 1/4", 3/8", and 5/16" diameters
Purchase Options:
Material & Coating
Cold-rolled "carbon steel" wire, heat treated for strength and durability and plated with an HCR (High Corrosion Resistant) double barrier coating. HCR is tested and recognized for use in ground contact pressure treated lumber for exterior, freshwater general construction applications. (e.g. AWPA UC1-UC4A, UCFA)
Features
• 10% FASTER INSTALLATION: Optimized thread pitch design along with SPAX 4CUT Point and serrated threads.
• NO PRE-DRILLING REQUIRED: Razor-sharp tip delivers a fast, clean start, reduces splitting, and ensures smoother installation in wood and treated lumber.
• SECURE HEX HEAD DESIGN: The hex head offers a confident, slip-free fit, ensuring maximum torque and reducing the risk of stripping or cam-outs for a smoother, hassle-free installation.
• CODE-APPROVED STRENGTH: Backed by third-party testing and IRC/IBC code approvals for structural use, delivering verified performance and peace of mind on demanding builds.
Typical Applications
• Deck ledger to residential band joist attachments
• Exterior treated lumber pergolas and gazebos
• Landscaping timber
• Outdoor furniture
• Exterior fencing posts
• Exterior out buildings
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Technical Bulletins
Design Values & Loads
Southern Pine(SG=.55)
| Diameter | 1/4" | 5/16" | 3/8" |
|---|---|---|---|
| Withdrawal W (lbs./inch) | 170 | 167 | 238 |
| Head Pull-Through WH (lbs.) | 450 | 500 | 620 |
Douglas Fir(SG=.50)
| Diameter | 1/4" | 5/16" | 3/8" |
|---|---|---|---|
| Withdrawal W (lbs./inch) | 170 | 170 | 205 |
| Head Pull-Through WH (lbs.) | 400 | 460 | 620 |
Hem Fir & Spruce-Pine-Fir(SG=.42)
| Diameter | 1/4" | 5/16" | 3/8" |
|---|---|---|---|
| Withdrawal W (lbs./inch) | 140 | 140 | 170 |
| Head Pull-Through WH (lbs.) | 300 | 360 | 510 |
1 Based upon ASD design loads. Values shall be multiplied by the applicable adjustment values provided in the 2024 National Design Specification (NDS) for Wood Construction.
2 Withdrawal values are pounds per inch of thread including the tip but excluding the length of the upper 4CUT™. Minimum penetration into the main member is 1-1/2" for the 1/4" and 5/16" diameters, 2" for the 3/8" diameter, and 3" for the 1/2" diameter.
3 Head pull-through values are based upon a 1-1/2" side member.
4 Lateral shear capacity is based upon a 1-1/2" side member and at least 1-1/2" penetration into the main member for the 1/4" and 5/16" diameters or 3-1/2" for the 3/8" or 1/2" diameters.
5 Tabulated values are based upon the specific gravities in the NDS. For specific gravities not listed, use the next lower value. When the connection has two different species, use the lower specific gravity.
