SPAX 5/16" X 4" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (250 EA) Bulk Pail Bit Included Heavy Duty Rust Resistant
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5% off when you buy 4 or more.
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Get 5% off your next purchase.
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Enjoy free delivery on orders above A$300.
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Orders are processed and shipped from Victoria, Australia.
3-6 days (Domestic)
30-Day Return Guarantee
Confidence-backed purchases with 30-day return support.
- Check out our Threads: Our patented thread technology allows the washer head screw to be driven faster, is easier to install, and reduces splitting in wood. Let SPAX take some of the hassle out of your next project.
- Heat Treated Grade 5 Durability: Stay Stronger for Longer! Subjecting the PowerLag screw to heat treating gives greater strength and reduces breakage. Tested under the toughest scenarios to give you confidence in every connection
- Options! And more Options: Offers the largest selection of code recognized structural wood to wood engineered fasteners in the industry
- ICC-ES building code recognized for use in structural wood to wood applications. ICC-ES Report ESR-1783. Manufactured to imperial size standards leading pull-through and withdrawal values. Recommended for use in treated lumber and exterior applications
- T-star Screw: T-Star drive accepts and is compatible with all industry standard bits. Our 6-Lobe design corrosion resistant screw provides superior bit engagement. Better bit engagement means quicker installation with less effort
Spax PowerLags Screws have a washer head with T-Star Drive and HCR-X (High Corrosion Resistant) exterior coating. Provides a new level of fastening efficiency and reliability to construction. Engineered specifically for demanding wood-to-wood structural applications, PowerLags feature patented thread serrations that eliminate pre-drilling and dramatically increase installation speed - requiring up to 40% less driving torque to increase installation speed. Fastener length stamp on the head provides convenient identification without measuring and aids on-site inspections. HCR-X Coating offers superior X-terior corrosion resistance when installed in treated lumber and is tested in coastal construction environments. All Spax PowerLags are building code listed and load rated, ICC-ES ESR-1782.
Package Dimensions:
1.0 inches x 4.0 inches x 1.0 inches. Weight: 1.0 lb
Specification:
| Item model number | 3581820801000 |
| Thread Style | Right Hand |
| Drive System | Torx |
| Thread Size | 5/16 x 4" |
| Measurement System | Imperial |
| Usage | Wood |
| Grade Rating | grade_ 5 |
| Batteries Required? | No |
| Brand | SPAX |
| Material | Carbon Steel |
| Thread Type | Un |
| Metal Type | Alloy Steel |
| Manufacturer | Altenloh, Brink & Co |
| Item Package Quantity | 1 |
| Item dimensions L x W x H | 4 x 1 x 1 inches |
| Item Weight | 1 pounds |
| Thread Coverage | Fully Threaded |
| Head Style | Modified Truss |
| Special Features | Low Profile |
| Part Number | 3581820801000 |
| Fastener Type | Washer Head T-Star Screw |
| Global Trade Identification Number | 00712216020566 |
| Included Components | Building Materials & Ladders; Decking & Fencing; lag-screws |
| Product Dimensions | 4 x 1 x 1 inches |
| Size | 5/16 x 4" |
Shipping & Delivery
At SecretGreen, we aim to deliver your order as quickly and safely as possible.
Domestic Shipping :
Orders are typically delivered within 3–6 business days.
International Shipping:
Estimated delivery time is 12–26 business days, depending on the destination and customs processing.
You will receive a tracking number once your order has been dispatched. Delivery times may vary during holidays or due to unforeseen delays.