Best Wood Lag Screws in 2026

Flat Head Multi-Material Construction Screws With T-Star Plus Drive And Yellow Zinc Coating For Interior Use Are The Versatile Fastening Solution For A Wide Range Of Applications In Multiple Materials Including Wood, Drywall, Masonry, Sheet Metal, And Plastic

Brand: PRIMESOURCE

Product Dimension: 3.0"L x 2.0"W x 4.0"H

Check out our Threads! Our patented thread serration technology allows the screw to be driven faster, reduces splitting in wood, and reduces driving torque by 40 percent. 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

Engineered and Manufactured in the USA

Lag Screw: The trend setting low profile built-on washer head design offers a contemporary and sleek finished installation. Excellent drawdown 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. The washer head screw is tested under the toughest scenarios to give you confidence in every connection

Check out our Threads: Our patented thread serration technology allows the corrosion-resistant 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

Designed to attach objects to wood and anchor masonry

Zinc finish provides fair corrosion and rust protection

Coarse threads requiring a pre-drilled hole with minimal clearance above the fastener

Size: 1/4 inch X 1-1/2 inch

Heavy duty wood screw with 6 sided hex bolt head

Features deep wood screw threads and does not accept a nut

MULTI-MATERIAL FUNCTION: The pack of 25 hex lag screws are designed to attach objects to wood and anchoring masonry

CORROSION-RESISTANT FINISH: The screws' zinc plating offers moderate protection against rust and corrosion

COARSE SCREW THREAD: Designed to prevent splitting or snapping in pre-drilled material

Best quality and Durable - This Hex Head Lag Screw made by Zink plated Steel to use both indoor and outdoor, Zinc plated surfaces are rust resistant. They have performance to instantly penetrate in high hardness and good toughness. Zinc plated surface also prevents corrosion and oxidation in both fresh and saltwater appliances.

Dimension - It has 0.3125-inches lag screws and 4-inch long. The lag type screw helps to make strong bonding and prevents stripping in materials. There is only one unit. Find the sizing option to get more quantity. Thank You!

This black zinc plated lag bolt is typically used for joining two pieces' wood or metal plate on wood. No need pre-drilling on wood surfaces. But if you want to join with metal object, you need pre-drilling. If the drilling is more than Bolt, can use washer.