--- product_id: 27070033 title: "SPAX 1/4\" x 3-1/2\" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant" brand: "spax" price: "7511 kr" currency: ISK in_stock: true category: "Spax" url: https://www.desertcart.is/products/27070033-spax-1-4-x-3-1-2-exterior-washer-head store_origin: IS region: Iceland --- # 1/4" x 3-1/2" size precision Heat-treated Grade 5 strength T-Star drive for faster install SPAX 1/4" x 3-1/2" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant **Brand:** spax **Price:** 7511 kr **Availability:** ✅ In Stock ## Summary > 🔧 Power your projects with precision & strength — don’t settle for less! ## Quick Answers - **What is this?** SPAX 1/4" x 3-1/2" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant by spax - **How much does it cost?** 7511 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/27070033-spax-1-4-x-3-1-2-exterior-washer-head) ## Best For - spax enthusiasts ## Why This Product - Trusted spax brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-Inclusive Kit:** Includes 50 screws plus a compatible T-Star bit—everything you need to upgrade your project with professional-grade hardware. - • **Patented Thread Tech:** Faster driving, easier installation, and minimized wood splitting for flawless structural connections. - • **Unmatched Durability:** Heat-treated Grade 5 carbon steel ensures maximum strength and reduces breakage under toughest conditions. - • **Sleek Built-In Washer Head:** Contemporary low-profile design eliminates need for separate washers, delivering superior clamping with 40% less torque. - • **ICC-ES Certified Reliability:** Meets stringent building codes (ESR-1783) for structural wood-to-wood applications, perfect for treated lumber and exterior use. ## Overview SPAX 1/4" x 3-1/2" PowerLag screws feature a sleek washer head design and heat-treated Grade 5 carbon steel for superior strength and durability. Their patented thread technology and T-Star drive system enable faster, easier installation with less wood splitting. ICC-ES certified for structural wood applications, these rust-resistant screws come in a 50-piece set with a matching bit included, making them the go-to choice for professionals demanding reliable, long-lasting exterior fastening solutions. ## Description The SPAX Factor - For the craftsman that concentrates on the details, We Work for You. For the Pro that puts quality first, we help you create stronger connections, enhance performance and improve results when your reputation is on the line. Say goodbye to your father’s traditional lag. SPAX PowerLag Screws offer superior installation performance and durability over traditional lag screws and carriage bolts for structural wood construction. These T-star washer head screws are made of carbon steel and coated for long term durability to ensure your project endures. U.S made SPAX is your trusted partner for your fastening needs. Do it Once, Do it Right with SPAX. The item includes a bit in the pail. ## Features - T-Star Screw: The trend setting low profile built-on washer head design offers a contemporary & sleek finished installation. Excellent draw down strength without the need for a separate washer delivers superior clamping ability and 40% less driving torque - 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. - 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. The item includes a bit in the pail. - 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B018JQFDJE | | Best Sellers Rank | #20,298 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #419 in Wood Screws | | Brand | SPAX | | Color | Black | | Compatible Groove Diameter | 0.25 inches | | Customer Reviews | 4.8 4.8 out of 5 stars (614) | | Drive System | Torx | | Exterior Finish | Black Oxide | | Fastener Size | 3-1/2" | | Fastener Type | Wood Screws | | Finish Types | Black Oxide | | Global Trade Identification Number | 00712216019195 | | Grade Rating | grade_ 5 | | Head Type | Truss | | Included Components | Building Materials & Ladders; Decking & Fencing; lag-screws | | Item Diameter | 0.25 inches | | Item Dimensions | 3.5 x 0.25 x 0.25 inches | | Item Type Name | lag-screws | | Item Weight | 1.8 pounds | | Manufacturer | Altenloh, Brink & Co | | Material Type | Carbon Steel | | Maximum Shear Strength | High (structural wood applications, grade 5) | | Metal Type | Alloy Steel | | Model | 4581820000000 | | Number Of Items | 50 | | Number of Pieces | 50 | | Outside Diameter | 0.25 inches | | Part Number | CECOMINOD068517 | | Screw Head Style | Washer Head | | Screw Point Style | Self-Tapping | | Set Name | 50-Piece Set | | Set Screw Thread Type | UNC | | Size Name | 1/4 x 3-1/2" | | Thread Class | 3A | | Thread Coverage | Fully Threaded | | Thread Size | 1/4 x 3" | | Thread Style | Right Hand | | Thread Type | Un | | UPC | 712216019195 | | Unit Count | 1 Count | ## Product Details - **Exterior Finish:** Black Oxide - **Head Style:** Washer Head - **Item dimensions L x W x H:** 3.5 x 0.25 x 0.25 inches - **Material:** Carbon Steel - **Thread Size:** 1/4 x 3" ## Images ![SPAX 1/4" x 3-1/2" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant - Image 1](https://m.media-amazon.com/images/I/21MI2Zp-hIL.jpg) ![SPAX 1/4" x 3-1/2" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant - Image 2](https://m.media-amazon.com/images/I/31yzsljeBjL.jpg) ![SPAX 1/4" x 3-1/2" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant - Image 3](https://m.media-amazon.com/images/I/41yDZdPy4wL.jpg) ![SPAX 1/4" x 3-1/2" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant - Image 4](https://m.media-amazon.com/images/I/51U03GPWwlL.jpg) ![SPAX 1/4" x 3-1/2" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant - Image 5](https://m.media-amazon.com/images/I/41iGeTI+XyL.jpg) ## Available Options This product comes in different **Color, Size, Number Of Items** options. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.is/products/27070033-spax-1-4-x-3-1-2-exterior-washer-head](https://www.desertcart.is/products/27070033-spax-1-4-x-3-1-2-exterior-washer-head) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-10-01*