---
product_id: 52401570
title: "SPAX 1/4\" x 3\" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant"
brand: "spax"
price: "$U2961"
currency: UYU
in_stock: true
reviews_count: 8
category: "Spax"
url: https://www.desertcart.uy/products/52401570-spax-1-4-x-3-exterior-washer-head-structural-wood
store_origin: UY
region: Uruguay
---

# Heat-treated Grade 5 strength High Corrosive Resistant coating Patented fast-drive thread tech SPAX 1/4" x 3" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant

**Brand:** spax
**Price:** $U2961
**Availability:** ✅ In Stock

## Summary

> 🔩 Upgrade your build with the screw that works as hard as you do!

## Quick Answers

- **What is this?** SPAX 1/4" x 3" 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?** $U2961 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/52401570-spax-1-4-x-3-exterior-washer-head-structural-wood)

## 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

- • **Speedy Installation:** Patented thread technology reduces drive time and wood splitting—get the job done faster.
- • **Unmatched Durability:** Heat-treated Grade 5 carbon steel ensures superior strength and breakage resistance.
- • **Weatherproof Performance:** High Corrosive Resistant coating perfect for treated lumber and harsh exterior conditions.
- • **Effortless Bit Engagement:** T-Star Plus head design delivers superior grip for quicker, less tiring fastening.
- • **Sleek Built-In Washer Head:** Contemporary low-profile design for a flawless finish without extra washers.

## Overview

The SPAX 1/4" x 3" PowerLag screws combine German engineering with American manufacturing to deliver heavy-duty, rust-resistant fastening solutions. Featuring a sleek washer head, patented fast-drive threads, and heat-treated Grade 5 carbon steel, these screws excel in exterior wood construction—offering superior clamping strength, corrosion resistance, and faster installation for professional-grade results every time.

## Description

Discover the Spax Advantage! this German engineered/American made Spax 1/4 x 3in. T-star Drive washer head HCR PowerLag offers a premium quality fastening solution to help ensure professional results in less time than inferior imported screws. Say good Bye to your fathers traditional lag. Spax PowerLags offer superior installation performance and durability over traditional lag screws and carriage bolts for structural wood construction. Made of carbon steel and coated for long term durability to ensure your project endures. Do it Once, do it right with Spax.

Review: Great Product - I used several hundred of these screws on a small cattle barn and corral I built. They have plenty of holding power. Only one broke and I’m pretty sure that was my fault. Be sure to use with a good impact driver!!
Review: Best Structural Screw - Great structural screw for use in treated lumber and composite lumber. I used in building a large deck with composite lumber, has great pullout resistance and corrosion resistance and the washer head holds pieces together tight.

## Features

- The trend setting low profile built-on washer head design offers a contemporary and sleek finished installation. Excellent draw down strength without the need for a separate washer delivers superior clamping ability and a easier installation
- Check out our Threads!! our patented thread technology allows the 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
- High Corrosive resistant (HCR) coating makes these screws ideal for use in treated lumber and exterior applications
- Heat treated Grade 5 Durability. Subjecting the screw to heat treating gives greater strength and reduces breakage
- T-Star plus head provides superior bit engagement. Better bit engagement means quicker installation with less effort

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B018JQFBT6 |
| Best Sellers Rank | #22,097 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #27 in Lag Screws |
| Brand | SPAX |
| Color | Black |
| Date First Available | November 25, 2015 |
| Exterior Finish | Anti-Corrosion Topcoat |
| Fastener Size | 1/4 inch x 3 inches |
| Fastener Type | Wood Screws |
| Global Trade Identification Number | 00712216019171 |
| Head Style | Washer Head |
| Head Type | Round |
| Item Diameter | 0.25 Inches |
| Item Weight | 1.71 pounds |
| Item model number | 4581820700765 |
| Manufacturer | Altenloh, Brink & Co |
| Material | Carbon Steel |
| Maximum Shear Strength | greater than 38 ksi |
| Metal Type | High Carbon Steel |
| Number of Pieces | 50 |
| Point Style | Type 17 Point |
| Size | 1/4 x 3" |
| Thread Coverage | Partially Threaded |
| Thread Size | 1/4" |
| Thread Style | Left Hand |
| Thread Type | Un |
| UPC | 712216019171 |

## Product Details

- **Exterior Finish:** Anti-Corrosion Topcoat
- **Head Style:** Washer Head
- **Item dimensions L x W x H:** 3 x 0.25 x 0.25 inches
- **Material:** Carbon Steel
- **Thread Size:** 1/4"

## Images

![SPAX 1/4" x 3" 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/214FvD0PEuL.jpg)
![SPAX 1/4" x 3" 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/31Uff0vlsBL.jpg)
![SPAX 1/4" x 3" 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/41+b3Q07s6L.jpg)
![SPAX 1/4" x 3" 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/413nepDO-ZL.jpg)
![SPAX 1/4" x 3" 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/61pHh6UZIoL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Product
*by T***N on January 6, 2026*

I used several hundred of these screws on a small cattle barn and corral I built. They have plenty of holding power. Only one broke and I’m pretty sure that was my fault. Be sure to use with a good impact driver!!

### ⭐⭐⭐⭐⭐ Best Structural Screw
*by J***N on November 7, 2025*

Great structural screw for use in treated lumber and composite lumber. I used in building a large deck with composite lumber, has great pullout resistance and corrosion resistance and the washer head holds pieces together tight.

### ⭐⭐⭐⭐⭐ Excellent product!!
*by K***E on September 23, 2025*

Excellent product!! No predrilling required - will not split the wood.

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-08*