The 7 Best 3.5 Lag Screws (2023 reviews)

We consider a 3.5 lag screw to be a worthy investment in the long run. We are here to help you choose the right one for your purposes from all the best available products in market today.

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Our Top Picks:

Best Overall: Buy: Makers Bolt 3.5 Lag Screw READ REVIEW

Best With Washer: Buy: Makers Bolt 3.5 Lag Screw READ REVIEW

Best For pressure: Buy: SPAX 3.5 Lag Screw READ REVIEW

Best For Home decoration: Buy: Glvaner 3.5 Lag Screw READ REVIEW

Best For routine maintenance: Buy: Jrouth 3.5 Lag Screw READ REVIEW

Best For treated lumber: Buy: The Hillman Group 3.5 Lag Screw READ REVIEW

Best For Use: Buy: The Hillman Group 3.5 Lag Screw READ REVIEW

Best Overall: Makers Bolt 3.5 Lag Screw

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Not everyone likes to purchase screw for their regular usage, but the makers bolt 3.5 lag screw would be an anomoly. These metal wood screws are great for exterior household and industrial applications such as deck building or joining lumber. These stainless black screws are coated with black oxide proudly applied in the usa to military specifications, giving the screws a sleek look and added corrosion and abrasion resistance. The coating not only provides a non-reflective look, it also provides increased corrosion and abrasion resistance.

The Black Oxide is applied to military spec MIL-DTL. Unlike painted, powder coated, or zinced finishes, this finish will not chip, peel, or scratch off off. It is used for wood applications where a heavy-duty fastener is needed to join to pieces of wood or attach metal to wood. These black lag bolts are perfect for exterior applications where high corrosion and rust resistance is required such as deck building or manufacturing assembly equipment.

• Lot of satisfied buyers
• Good brand reputation

Best With Washer: Makers Bolt 3.5 Lag Screw

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The makers bolt 3.5 lag screw should be able to handle its purpose and duties with ease. These metal wood screws are great for exterior household and industrial applications such as deck building or joining lumber. They are very good and durable. They are manufactured and finished with makers in mind. The rich black color will enhance the final appearance of any project.

These stainless black screws are coated with black oxide proudly applied in the usa to military specifications, giving the screws a sleek look and added corrosion and abrasion resistance. It is great replacement bolts for security doors if you dont need one-way 4” screws. The Durable oxide and dry wax coating provide enhanced protection against peeling, scratches, and corrosion. They're the same quality and will last a long time as well.

• Nice hefty bolts, great to mount a pull up bar
• Confident enough to park a nice car under them every day
• Nicely coated, does not scratch off
• Easy to use, fit into ratchet perfectly, appears to be well coated

Best For pressure: SPAX 3.5 Lag Screw

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Not everyone likes to purchase screw for their daily usage, but the spax 3.5 lag screw would be an anomoly. These SPAX bolts work well for pressure treated lumber in an outdoor installation. It provides superior bit engagement and provides outstanding clamping force and improved aesthetics. It will hold the world together. The length of 3" is great for doubling two boards together and avoiding the point to show up. It is easy to use and structural screws are available for framing.

These spax bolts work well for pressure treated lumber in an outdoor installation. It offers superior x-terior corrosion resistance when installed in treated lumber and is tested in coastal construction environments. It is perfect for exterior work.

• Solid structural screws to build playset
• Great item, strong and coated well
• Delivers what they promise

Best For Home decoration: Glvaner 3.5 Lag Screw

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If you are looking for a slightly raised screw head look, this is the one for you. It is made of 304 stainless steel 18-8 (a2) and has no exterior finish, greater strength and corrosion resistance performance in both indoor and outdoor projects. It is suitable for mechanical industry, office appliance, home decoration and other furniture repairs. It comes with the clean and bright pan head, the screws can quickly grasp and enter the object at the location you choose and screw it in quickly and safely.

You can drive these screws into softwood and plywood without drilling a pilot hole. It is perfectly for occasions where the head is not allowed to be exposed. It is used for securing wood in heavier duty applications.

• Good brand reputation
• Delivers what they promise

Best For routine maintenance: Jrouth 3.5 Lag Screw

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If you often find yourself scrambling for convenient and suitable screw, jrouth 3.5 lag screw should be your first option for buying. The box that it comes with is of a heavier type plastic with sturdy compartmentalized sections that separate each lag and washer. It has a lack of oxide finish. The threads are sharp and deep with absolutely no burrs. The box makes it worthwhile to just refill as appropriate.

These bolts work great to securely attach to studs. The THere's no oil, which is not needed, since these are stainless steel AND coated with a black oxide. These bolts are well made and you will keep them for future needs. It can be applied in even a severe environment.

• Very good quality stainless lag screws for outdoors
• Stainless steel which is very helpful in this marine, corrosive environment
• Good variety and number of different lengths

Best For treated lumber: The Hillman Group 3.5 Lag Screw

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The Hillman Group makes beautiful and great screw with classic and smartly choosen materials. Hex Lag Screws are used for directly fastening into wood surfaces. It is designed to embed into the wood, rather than relying on a nut to secure the connection. These are used with a lag shield, and lag screws can be used in masonry applications. It is six-sided and ideal for easy driving and quick installation. It is suitable for use in treated lumber.

• Lot of satisfied buyers
• Good investment for long term

Best For Use: The Hillman Group 3.5 Lag Screw

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The the hillman group 3.5 lag screw is capable of outshining several other screw featured in this list in overall features for the price point. Hex Lag Screws are used for directly fastening into wood surfaces. It is designed to embed into the wood, rather than relying on a nut to secure the connection. It is easily driven with simple wrenches and requires minimal clearance above the fastener. These are 1/4" so the pilot hole should be 3/16" in softwood and 7/32" in hardwood.

These are used with a lag shield, and lag screws can be used in masonry applications. It is six-sided and ideal for easy driving and quick installation. It is suitable for use in treated lumber.

• Excellent for fastening steel braces to wood to increase rigidity
• Well made and hot dipped galvanized
• Good investment for long term