---
product_id: 31651445
title: "SPAX 1/4\" x 2-1/2\" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant"
brand: "spax"
price: "VT15384"
currency: VUV
in_stock: true
reviews_count: 8
category: "Spax"
url: https://www.desertcart.vu/products/31651445-spax-1-4-x-2-1-2-exterior-washer-head
store_origin: VU
region: Vanuatu
---

# 1/4" x 2-1/2" heavy-duty size Heat-treated Grade 5 steel for max strength T-Star drive for faster, torque-efficient installs SPAX 1/4" x 2-1/2" Exterior Washer Head Structural Wood Lag Screws Powerlags Torx T-Star (50 EA) Bit Included Heavy Duty Rust Resistant

**Brand:** spax
**Price:** VT15384
**Availability:** ✅ In Stock

## Summary

> 🔩 Power your projects with SPAX – where strength meets sleek precision!

## Quick Answers

- **What is this?** SPAX 1/4" x 2-1/2" 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?** VT15384 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/31651445-spax-1-4-x-2-1-2-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 exceptional strength and reduces breakage under toughest conditions.
- • **Patented Thread Technology:** Faster driving, easier installation, and minimized wood splitting for flawless structural connections every time.
- • **Sleek Built-In Washer Head:** Contemporary low-profile design eliminates need for separate washers, delivering superior clamping with 40% less driving torque.
- • **Complete Kit with Bit Included:** Everything you need in one pail—compatible with all standard T-Star bits for quick, hassle-free fastening.
- • **ICC-ES Certified for Structural Use:** Meets rigorous building codes (ESR-1783) for treated lumber and exterior applications—trusted by pros.

## Overview

SPAX 1/4" x 2-1/2" PowerLag Structural Wood Lag Screws combine heat-treated Grade 5 alloy steel with patented thread technology and a low-profile T-Star washer head for superior clamping, durability, and faster installation. ICC-ES certified for structural wood applications, these rust-resistant screws come in a 50-piece set with a compatible bit included, making them the go-to choice for professionals demanding strength and efficiency in exterior and treated lumber projects.

## 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.

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

- 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 | B018JQFAA6 |
| Best Sellers Rank | #23,635 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #24 in Lag Screws |
| Brand | SPAX |
| Color | Black |
| Compatible groove diameter | 0.38 Inches |
| Date First Available | November 25, 2015 |
| Exterior Finish | Black Oxide |
| Fastener Size | 1/4 x 2-1/2 inches |
| Fastener Type | Structural Screws |
| Global Trade Identification Number | 00712216019157 |
| Head Style | Modified Truss |
| Head Type | Flat |
| Is Discontinued By Manufacturer | No |
| Item Diameter | 0.25 Inches |
| Item Weight | 1.3 pounds |
| Item model number | 4581820000000 |
| Manufacturer | Altenloh, Brink & Co |
| Material | Plastic |
| Metal Type | Alloy Steel |
| Number of Pieces | 50 |
| Point Style | T-Star |
| Set Name | 50-Piece Set |
| Set Screw Thread Type | UNC |
| Size | 1/4 x 2-1/2" |
| Thread Class | 2A |
| Thread Coverage | Fully Threaded |
| Thread Size | #0-80 |
| Thread Style | Left Hand |
| Thread Type | Un |
| UPC | 712216019157 |

## Product Details

- **Exterior Finish:** Black Oxide
- **Head Style:** Modified Truss
- **Item dimensions L x W x H:** 2.5 x 0.25 x 0.25 inches
- **Material:** Plastic
- **Thread Size:** #0-80

## Images

![SPAX 1/4" x 2-1/2" 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/21ea52OYaxL.jpg)
![SPAX 1/4" x 2-1/2" 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/31JDjknO-aL.jpg)
![SPAX 1/4" x 2-1/2" 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/41iGeTI+XyL.jpg)
![SPAX 1/4" x 2-1/2" 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/41lcD4AJo4L.jpg)
![SPAX 1/4" x 2-1/2" 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/41yDZdPy4wL.jpg)

## Available Options

This product comes in different **Size, Number Of Items** options.

## 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 Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-13*