The 7 Best round Head Lag Screws (2023 reviews)

Best For deck:

Best For treated lumber:

Best For outdoor Use:

Best For stud:

Best For metal:

Best For certain jobs:

Best Overall: round Head Lag Screw

The look and feel of this screws are consistent with the high quality we're used to from the rest of Woodpro Fasteners's lineup. These screws are the best for heavy wood projects. It is designed for use with wood. The "star" or "yorx" drive is excellent when it is difficult to align your driver with the screw. It works well securing 4x4 deck posts to the deck joists, from the post side.

The long screws are perfect when you need a screw with a shoulder washer built in. It is designed for wooden structural members.

Why We Like This:

Sharp type-17 point for easy drilling
Patented aster thread for quick starting
Lot of satisfied buyers

Best For deck: round Head Lag Screw

If you want nothing but a product that is reliable, this round head lag screw is certainly a right investment. These are very good screws, they will carry a heavy load and when you need to pull lumber together, they are the best. It is looking for a screw that requires no pre-drilling, starts fast, glides through wood with ease and won't slip your bit. It starts quick, turns easily, and holds great. It is used for a retaining wall with pressure treated 4x4s.

The coating is consistent from screw to screw. It has tremendous holding power, enough to flatten badly cupped syp 2x lumber. They are suitable replacements with equal connection strengths.

Why We Like This:

Great length for hanging cabinets on older lath-plaster walls
New and hot release

Best For treated lumber: round Head Lag Screw

The round head lag screw's high-end materials makes sure that it ages well with use. These are somewhat thicker screws compared to the average construction screw. It is great for outdoor projects. It works well with treated lumber. It is perfect for hanging cabinets. And it is an impact drill driver that makes life and projects worthwhile again.

Why We Like This:

Good size and length for hanging cabinets to stud / drywall walls
Super heavy duty and coated too
Great cutting power, like the torx head

Best For outdoor Use: round Head Lag Screw

The round head lag screw's superior materials makes sure that it ages well with use. These screws can be used for a wide range of interior and exterior applications. The large washer head covers enough fabric so that there's no danger of the fabric tearing off over the screw head. It provides quick starting and effortless drilling. The color is perfect for outdoor use.

These are long enough they are a lag screw. The washer head prevents pull through on the plywood. They hold up and drive straight and don’t break. It works well for this size framing.

Why We Like This:

Delivers what they promise
Good investment for long term

Best For stud: round Head Lag Screw

The round head lag screw is capable of outshining several other products featured in this list in overall features in its price range. The wood is very soft, probably cottonwood, and the wood screws with countersink style heads would just drive deeper and deeper but never really get tight. The washer head holds better than the standard counter sink screw and remains on the surface so it doesn't create a depression where water collects.

Why We Like This:

Screws are sized very well with ease of driving
Very strong, building corral pens with 2x6's and they work great
Screws in without splitting and washer head holds tight without sinking in

Best For metal: round Head Lag Screw

We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate screw. The product is exactly that - it's a simple product that hits all the right notes. WoodPro Washer Head Screws are coated by PPG Industries with an industry leading 1,500 hour for consistent layering that prevents recess fill while offering superior corrosion protection. Not only do they have a nice finish, but you can tell they are manufactured very well. The different pitch and aggression of the threads really makes it easy to drive the screws in. The secure STAR drive helps reduce bit slippage and a sharp Type-17 point with a patented ASTER thread provides quick starting and effortless drilling. It is made for a impact driver.

If you need a long screw with a low profile, this is the screw to use. The stronger PPG coating helps prevent chipping for added exterior corrosion protection. They are easy to use and dont split the wood.

Why We Like This:

Good investment for long term
One of the new comers and featured product

Best For certain jobs: round Head Lag Screw