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SPAX 5/16-in x 3-in Black Coated Hex -Head Exterior Structural wood screws 50 -Pack
Item #5745915 |
Model #4571820800755
4.9
$42.65
Length Measurement: 3-in
Screw Thickness: 5/16-in
Package Quantity: 50
Delivery
Maximum Qty of 500
SPAX 5/16-in x 3-in Black Coated Hex -Head Exterior Structural wood screws 50 -Pack
4.9
$42.65
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.
SPAX Hex Washer HCR Powerlags are intended for wood to wood connections in exterior structural applications - These fasteners are designed with a hex head conventional driver system along with a built in washer for applications requiring superior pull-down force - Often used in high torque applications
Cold-rolled carbon steel wire heat treated to Grade 5 durability and plated with an HCR (High Corrosion Resistance) double barrier coating - HCR is tested and recognized for use in ground contact pressure treated lumber for exterior, freshwater general construction applications (eg AWPA UC1-UC4A, UCFA).
The ideal replacement for the conventional lag - IRC/IBC Code Compliant: TER-No 1912-07
Engineered and Manufactured in the USA
Common applications: Landscaping timber, deck ledger attachment, fencing, exterior treated lumber, structural wood to wood connections
SPAX 5/16-in Hex PowerLags require a 7/16-in Hex Driver
General | |||
|---|---|---|---|
Finish | Coated | Package Quantity | 50 |
Manufacturer Color/Finish | Black | Use Location | Exterior |
Series Name | PowerLags | Head Type | Hex |
Type | Structural wood screws | Thread Type | Coarse |
Material | Steel | Point Type | Sharp |
Dimensions | |||
|---|---|---|---|
Length Measurement | 3-in | Screw Thickness | 5/16-in |
Features | |||
|---|---|---|---|
Drive | Hex | Multi-Material | No |
Materials Fastened | Wood to wood | ||
Certifications | |||
|---|---|---|---|
ACQ Approved | Yes | CA Residents: Prop 65 Warning(s) | No |
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
27 Reviews
3 Star
0%
1 Star
0%
89% Recommend this product
Ratings may include incentivized customer reviews.
27 Customer Reviews
Easy to use with battery drill
Very good to use on outside of house
DaveAugust 18, 2025
From 1_SLASH_4-in x 3-in Black Coated Hex -Head Exterior Structural wood screws 12 -Pack Verified Purchaser
From 1_SLASH_4-in x 3-in Black Coated Hex -Head Exterior Structural wood screws 12 -Pack Verified Purchaser
Was this Review Helpful ?
Lag Bolt Replacement for Treated Lumber
I purchased these Spax Lag Screws for a gazebo project and wanted something that was rated for treated lumber and was stronger than the galvanized lag bolts from the local farm store by-the-pound bin. I've used the 3" #10 torx screws by Spax and didn't have the first one to twist off below the head or strip out, so I'm betting that these Lag Screws will be of the same quality. Haven't used them yet and if they don't mark up then I'll post an updated review.
Poppy1June 10, 2025
From 3_SLASH_8-in x 5-in Black Coated Hex -Head Exterior Structural wood screws 150 -Pack Verified Purchaser
From 3_SLASH_8-in x 5-in Black Coated Hex -Head Exterior Structural wood screws 150 -Pack Verified Purchaser
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Fair price for can liners.
Handy size for laundry room waste dryer sheets.
RodswoodcraftsNovember 1, 2024
From 1_SLASH_4-in x 2-in Black Coated Hex -Head Exterior Structural wood screws 50 -Pack Verified Purchaser
From 1_SLASH_4-in x 2-in Black Coated Hex -Head Exterior Structural wood screws 50 -Pack Verified Purchaser
Was this Review Helpful ?
As described
Good product great price
QualtiyTimeJune 18, 2024
From 1_SLASH_4-in x 3-in Black Coated Hex -Head Exterior Structural wood screws 12 -Pack Verified Purchaser
From 1_SLASH_4-in x 3-in Black Coated Hex -Head Exterior Structural wood screws 12 -Pack Verified Purchaser
Was this Review Helpful ?
Good screw
Product is easy to install and holds well.
May 2, 2024
From 3_SLASH_8-in x 6-in Black Coated Hex -Head Exterior Structural wood screws Verified Purchaser
From 3_SLASH_8-in x 6-in Black Coated Hex -Head Exterior Structural wood screws Verified Purchaser
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2 Questions
2 Questions
Verified Pro Jay944 on September 14, 2023
1
Answer
RoseCotton on March 20, 2023
1
Answer