--- 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: "€ 77.69" currency: EUR in_stock: true category: "Spax" url: https://www.desertcart.com.cy/products/27070033-spax-1-4-x-3-1-2-exterior-washer-head store_origin: CY region: Cyprus --- # 1/4" x 3-1/2" precision size 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:** € 77.69 **Availability:** ✅ In Stock ## Summary > 🔧 Power your projects with SPAX: Stronger, Sleeker, Smarter fastening! ## 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?** € 77.69 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/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 - • **Unmatched Durability:** Heat-treated Grade 5 alloy steel ensures maximum strength and reduces breakage under toughest conditions. - • **Complete Kit Convenience:** Includes 50 screws plus a compatible T-Star bit—everything you need to get the job done right, right now. - • **Patented Thread Technology:** Faster driving, easier installation, and minimized wood splitting for flawless structural connections. - • **Sleek Built-In Washer Head:** Contemporary low-profile design eliminates need for separate washers, delivering superior clamping with 40% less torque. - • **ICC-ES Certified for Structural Use:** Meets rigorous building codes for treated lumber and exterior wood applications—trusted by pros. ## Overview SPAX 1/4" x 3-1/2" PowerLag Structural Wood Lag Screws combine heat-treated Grade 5 alloy steel with patented thread design and a sleek washer head for superior strength, faster installation, and code-compliant performance in exterior wood applications. Each 50-piece set includes a T-Star bit for immediate use, making it the go-to choice for professionals demanding durability and efficiency. ## 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 | #14,232 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #362 in Wood Screws | | Brand | SPAX | | Color | Black | | Compatible Groove Diameter | 0.25 inches | | Customer Reviews | 4.8 4.8 out of 5 stars (613) | | 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/41Mhc+j2cYL.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/61C+hRkqVzL.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/61Wpyk4vf4L.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/81bP437bGWL.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/71Yyr6Q1rOL.jpg) ## Available Options This product comes in different **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.com.cy/products/27070033-spax-1-4-x-3-1-2-exterior-washer-head](https://www.desertcart.com.cy/products/27070033-spax-1-4-x-3-1-2-exterior-washer-head) --- *Product available on Desertcart Cyprus* *Store origin: CY* *Last updated: 2026-08-17*