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SPAX 1/4-in x 4-in Black Coated Washer -Head Exterior Structural wood screws

Name: SPAX 1/4-in x 4-in Black Coated Washer -Head Exterior Structural wood screws
Brand: SPAX
SKU: 5001699893
Price: 1.78 USD
Availability: InStock
Rating: 5 (22 reviews)

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The SPAX Factor - For the craftsman that concentrates on the details, We Work for You. For the Pro that puts qualify first, we help you create stronger connections, enhance performance and improve results when your reputation is on the line. 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. U.S made SPAX is your trusted partner for your fastening needs. Do it Once, Do it Right with SPAX.

Check out our Threads - Our patented thread serration technology allows the screw to be driven faster, easier to install, and reduces splitting in wood - Let the SPAX FACTOR take some of the hassle out of your next project
The ideal replacement for the conventional lag - IRC/IBC Code Compliant: TER-No 1912-07
True to size thread diameters, grade 5 heat treat, and the washer head style are just some of this fasteners distinct advantages - Tested under the toughest scenarios to give you confidence in every connection
T-Star 6 lobe design is compatible with all industry standard bits and provides superior bit engagement
The HCR (High Corrosion Resistant) double barrier coating is tested and recognized for use in ground contact and pressure treated lumber for exterior fresh water general construction applications
Engineered and Manufactured in the USA
Common applications: Landscaping timber, deck ledger attachment, fencing, exterior treated lumber, structural wood to wood connections
SPAX 1/4-in PowerLags require a T-Star driver bit: T-30 Bit

General
Head Type	Washer	Finish	Coated
Type	Structural wood screws	Package Quantity	1
Use Location	Exterior	Manufacturer Color/Finish	Black
Thread Type	Coarse	Point Type	Sharp
Material	Steel	Series Name	PowerLags

Dimensions
Length Measurement	4-in	Package Weight (lbs.)	0.042
Screw Thickness	1/4-in

Features
Drive	Star	Multi-Material	No
Self-Tapping	Yes	Coated	Yes
Materials Fastened	Wood to wood

Certifications
CA Residents: Prop 65 Warning(s)	No	ACQ Approved	Yes
ACQ Coated	Yes

Compatibility
For Use on Brick	No	For Use on Concrete	No
For Use on Composite	No	For Use on Drywall	No
For Use on Metal	No	For Use on Wood	Yes
For Use on Vinyl	No	For Use on Plastic	No

Miscellaneous
UNSPSC	31161500

Check out the Best Selling Lag Screws on Lowes.com

Review

5 out of 5

22 Reviews

3 Star

2 Star

1 Star

100% Recommend this product

Ratings may include incentivized customer reviews.

22 Customer Reviews

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Stock item, let me finish my work

laceSeptember 19, 2026
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Nice long screw

Would Recommend

This was a long screw. Just what I was looking for when I went to Lowes

Lowes FanJune 18, 2026
Verified Purchaser

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How the head of the screw sets flush

Would Recommend

Sturdy and threaded just enough

May 24, 2026
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COMPARE PRODUCTS

		Name	Current Item SPAX1/4-in x 4-in Black Coated Washer -Head Exterior Structural wood screws
		Ratings	22
		Length Measurement	4-in
		Material	Steel
		Type	Structural wood screws
Power Pro5/16-in x 4-in Bronze Epoxy Round -Head Exterior Lag screws	SPAX1/4-in x 5-in Black Coated Washer -Head Exterior Structural wood screws	Hillman5/16-in x 4-in Black Hardened Round -Head Exterior Lag screws 4 -Pack	Deck Plus3/8-in x 4-in Black Epoxy Hex -Head Exterior Lag screws	SPAX5/16-in x 4-in Black Coated Washer -Head Exterior Structural wood screws	Power Pro1/4-in x 4-in Black Epoxy Hex -Head Exterior Structural wood screws	SPAX3/8-in x 5-in Black Coated Washer -Head Exterior Structural wood screws	SPAX3/8-in x 6-in Black Coated Washer -Head Exterior Structural wood screws	SPAX5/16-in x 4-1/2-in Black Coated Washer -Head Exterior Structural wood screws
157	35	13	42	13	7	4	6
4-in	5-in	4-in	4-in	4-in	4-in	5-in	6-in	4-1/2-in
Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel
Lag screws	Structural wood screws	Lag screws	Lag screws	Structural wood screws	Structural wood screws	Structural wood screws	Structural wood screws	Structural wood screws