Skip to content
Free Local Pickup Ship to Your Hometown Store
Pro & Contractor Accounts Apply for Net Terms
100,000+ Products Trusted American Hardware Brands

SPAX PowerLags 5/16 in. in. X 4 in. L T-40 Washer Head Serrated Structural Screws

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Discover the strength and reliability of SPAX PowerLags 5/16 in. X 4 in. L T-40 Washer Head Serrated Structural Screws for your woodworking projects.
Spax MPN 4581820801005 In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $41.99. Our online price is $46.99.
$46.99
Includes free shipping on orders over $75 · $8.99 standard below
Delivery in as little as 1–4 business days Order within for same-day shipping
Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

About Product Overview

Upgrade your woodworking projects with the SPAX PowerLags 5/16 in. X 4 in. L T-40 Washer Head Serrated Structural Screws. Designed for exceptional strength and durability, these screws are perfect for wood-to-wood applications, including framing, ensuring a solid and reliable connection.

Key Features:

  • Size: 5/16 inch diameter, 4 inches in length, making them ideal for various structural needs.
  • Drive Style: T-40 drive allows for easy installation with a compatible driver bit included.
  • High Corrosion Resistance: Built to withstand tough environments, enhancing longevity and performance.
  • Washer Head: The washer head design provides increased load distribution, preventing pull-through and ensuring stability.
  • Serrated Design: The serrated structure helps reduce installation torque, making driving easier and faster.

Constructed from high-quality materials, SPAX PowerLags 5/16 in. X 4 in. L T-40 Washer Head Serrated Structural Screws offer Grade 5 strength, ensuring your projects can withstand heavy loads and resist common stress factors. Whether you're a professional contractor or a weekend DIY enthusiast, these screws will help you achieve remarkable results every time.

Don't settle for less when it comes to securing your wood structures. Experience the unparalleled performance and reliability of SPAX PowerLags 5/16 in. X 4 in. L T-40 Washer Head Serrated Structural Screws. Order yours today and elevate your woodworking projects!

The Details Specifications

Brand Spax
SKU 5034886
UPC 712216019331
Unit 0
Case Pack Quantity 4 per case
Retail Unit Quantity 1
Unit of Measure 50 PK
Dimensions (L × W × H) 3 × 8 × 3
Weight 3 lbs
Cubic Feet 0.05053 ft³
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare