The 6 Best Steel Lag Screws (2023 reviews)

The chenango supply steel lag screw is long-lasting, rigid and fits well with your regular usage like a dream. It is used to fasten a ss handrail to a boat dock. It can also be used in conjunction with lag shield anchors to secure to concrete. They are stainless and work. It is used to join items to lumber or wood floors. They are good for constructing decks. They are good for applications where they will be used outside.

Why We Like This:

Great corrosion resistance for outside applications
Being stainless steel, no worries about rust
One of the new comers and featured product

Best For deck: Primeline Steel Lag Screw

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This is designed to cut into wood. It features deep wood screw threads and does not accept a nut. It can be used in place of standard wood screws whenever the mounting surface must bear a heavy load.

These are ideal for use on decks since installation can be accomplished without having access to both ends of the fastener, as opposed to standard hex bolts that require a nut on the opposite end. It allows for lag screws to be tightened with more torque than can be used on phillips head screws, though a pilot hole is still required prior to installation.

Why We Like This:

Stainless steel bolt with wood grip threads
Requires pilot hole to be drilled and installs using wrench or socket tool
Heavy duty wood screw with 6 sided hex bolt head

Best With Washer: Vigrue Steel Lag Screw

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The vigrue steel lag screw should be able to handle its purpose and duties with ease. This item gives you a nice selection of 1/4" diameter lag bolts in a variety of lengths. It includes 5 different most common used sizes. They are sharp, but not ragged, so they have obviously polished them/tumbled the lumber. The bolt on the left has fairly smooth thread edges and the central shaft is also fairly smooth. This is a nice assortment of lags for someone that occasionally needs to attach something to a wood structure.

The set comes in a plastic tray with dividers for each different item. These are often used with a washer which distribute the pressure of the head evenly so that to prevent pull through. It can be applied in even a severe environment.

Why We Like This:

Very useful for setting stair base plates
All are stainless steel so they are usable for outdoor or marine environments
Come in 5 different lengths from 1 inch to 3 inches and washers

Best With Shield: Qlvily Steel Lag Screw

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The qlvily steel lag screw is the best reliable screw on the market today. It is perfect for an outdoor fencing project. They are mildly magnetic, estimated at about 20% as magnetic as plain carbon steel. The length of these lag bolts are perfect to fasten some panels securely to the wood. They are coated with a black paint that should prevent them from rusting. The packaging is a brittle clear plastic bag.

These are good quality stainless steel lag screws. They all go into the wood easily and tighten up without breaking or stripping out. It has magnetism, which is not as big as iron.

Why We Like This:

Comes with washers and the size and material checks out
Well made lag screws with washers
Black coating is well applied, bold is super sharp and washers are perfect
Sturdy and very pleasant to work with and look at

Best With Thread: Raw products Corp Steel Lag Screw

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The raw products corp steel lag screw's material feels more premium than its price would suggest. The Hex Head Lag Screws in this selection are made of 316 stainless steel. They feature the sharp cutting threads of a wood screw or sheet metal screw and have a shoulder below the head (in longer lengths), however everything is scaled up in size for use in larger applications. It can also be used with lag shield masonry anchors to anchor fixtures to concrete and other masonry materials.

The Lag bolts feature a hex head and are designed to be driven with a wrench or hex driver. It is valued for its high corrosion and rust resistance when exposed to salt water moisture and the elements for a long lasting application. These are just very large wood screws. It can be used in heavy duty carpentry applications including lumber framing and anchoring equipment to wood such as machinery and large vices.

Why We Like This:

Features the sharp cutting threads of a wood screw
Significantly larger than most other wood screws
Feature the sharp cutting threads for excellent retention in wood and other soft materials
Highly corrosion and rust resistant 316 stainless steel

Best With anchor: Fastener Superstore Steel Lag Screw

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate screw. The fastener superstore steel lag screw is exactly that - it's a simple screw that hits all the right notes. For general anchoring purposes where you can sink the lag in all the way, they work great as huge tent stakes with an impact driver. This is a box of 50 lag screws. They're perfect and plenty long enough so they'll never get accidentally pulled out.

Why We Like This:

Worked well as anchors at burning man
Good investment for long term