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1k+ bought last week
SPAX 1/4-in x 4-in Black Coated Washer -Head Exterior Structural wood screws
Item #3753048 |
Model #4581820701007
4.7
$1.78
Length Measurement: 4-in
Package Quantity: 1
Maximum Qty of 500
SPAX 1/4-in x 4-in Black Coated Washer -Head Exterior Structural wood screws
4.7
$1.78
Best Price. Guaranteed
Find a lower price on an exact item? We'll match it. Some exclusions apply.
Learn MoreThe 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 | |||
|---|---|---|---|
Finish | Coated | Package Quantity | 1 |
Manufacturer Color/Finish | Black | Use Location | Exterior |
Series Name | PowerLags | Head Type | Washer |
Type | Structural wood screws | Thread Type | Coarse |
Material | Steel | Point Type | Sharp |
Dimensions | |||
|---|---|---|---|
Length Measurement | 4-in | Screw Thickness | 1/4-in |
Package Weight (lbs.) | 0.042 | ||
Features | |||
|---|---|---|---|
Coated | Yes | Multi-Material | No |
Drive | Star | Self-Tapping | Yes |
Materials Fastened | Wood to wood | ||
Certifications | |||
|---|---|---|---|
ACQ Approved | Yes | CA Residents: Prop 65 Warning(s) | No |
ACQ Coated | Yes | ||
Warranty | |||
|---|---|---|---|
Warranty | Limited lifetime | ||
Compatibility | |||
|---|---|---|---|
For Use on Plastic | No | For Use on Concrete | No |
For Use on Composite | No | For Use on Drywall | No |
For Use on Metal | No | For Use on Brick | No |
For Use on Wood | Yes | For Use on Vinyl | No |
Miscellaneous | |||
|---|---|---|---|
UNSPSC | 31161500 | ||
Check out the Best Selling Lag Screws on Lowes.com
Review
137 Reviews
2 Star
0%
97% Recommend this product
Ratings may include incentivized customer reviews.
What Customers Are Saying
The screws are reported to be high-quality, sturdy, and easy to use. Customers praised their strength and durability, noting they could securely fasten various materials. The self-drilling feature was also highlighted as convenient. While a few customers found the screws more expensive or had issues with the included bits, the overall consensus is that these are excellent structural screws that perform well for construction and DIY projects.
Customer review summary generated by AI, including incentivized reviews.137 Customer Reviews
Stout and Sturdy
Seems to be doing the job.
pcpurserSeptember 8, 2025
From 1_SLASH_4-in x 3-in Black Coated Washer -Head Exterior Structural wood screws Verified Purchaser
From 1_SLASH_4-in x 3-in Black Coated Washer -Head Exterior Structural wood screws Verified Purchaser
Was this Review Helpful ?
Exactly what I needed.
Modern and worked for my mailbox project, fully recommend.
This is BobbieSeptember 2, 2025
From 1_SLASH_4-in x 3-in Black Coated Washer -Head Exterior Structural wood screws Verified Purchaser
From 1_SLASH_4-in x 3-in Black Coated Washer -Head Exterior Structural wood screws Verified Purchaser
Was this Review Helpful ?
Good product
The product worked as expected.
KenJAugust 30, 2025
Verified Purchaser
Verified Purchaser
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6 Questions
6 Questions
Hoff on July 15, 2025
1
Answer
Bob1 on August 31, 2024
1
Answer
Margot on October 12, 2023
1
Answer
RNSD on January 29, 2023
1
Answer
Pete on September 27, 2022
1
Answer
Can I use these for for installing block between floor joists or are the Spax #10 construction screws sufficient?
Trav on December 3, 20220
Answers