Prices, Promotions, styles, and availability may vary. Our local stores do not honor online pricing. Prices and availability of products and services are subject to change without notice. Errors will be corrected where discovered, and Lowe's reserves the right to revoke any stated offer and to correct any errors, inaccuracies or omissions including after an order has been submitted.

5/16-in x 6-in Bronze Ceramic Round -Head Exterior Lag screws

Ratings & Reviews for Power Pro 5/16-in x 6-in Bronze Ceramic Round -Head Exterior Lag screws

4.6
121
Review
 4.6 out of 5
121 Reviews


88% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise these lag screws for exceptional holding power and reliability in demanding wood projects, with nearly 9 in 10 expressing strong satisfaction. Reviewers consistently highlight superior grip, aggressive threads, and the Torx drive system that prevents stripping and enables smooth installation with impact drivers. Many report successfully securing heavy components like 4x4s, deck beams, and mounts supporting over 1,000 lbs without movement. While most users install without pre-drilling, some note that dense or treated wood benefits from pilot holes and proper technique. A few mention higher pricing compared to alternatives, though most consider the performance worth the investment.

Customer review summary generated by AI, including incentivized reviews.
121 Customer Reviews

Great holding power

Would Recommend

Holds great. Used these on our basement stair railing to hold the posts to the stringer. Even though screw has a self drilling feature, I had to drill a pilot hole the help get it started and also to help get it all the way into the boards. It will take an impact drill to get one of this length into the wood and is still difficult. The only real negative is the cost but I did not need many for this job.

Was this Review Helpful ?

Best again

Would Recommend

NOT "Irritated Customer" this time. Having used this type lag screw before, I have now used additional of same to secure treated plywood deck onto treated 2x4 joists of ramp that I built into our storage building. They are available in various lengths, have superior thread with self-drilling tip (although drilling pilot hole prevents splitting wood member), and torx-type head allows plenty of torque for tightening.

March 12, 2014
From 5_SLASH_16-in x 3-in Bronze Ceramic Round -Head Exterior Lag screws Verified PurchaserVerified Pro
Was this Review Helpful ?

Secured floor joists with ease

Would Recommend

In repairing subfloor damage in our bathroom, I needed to add extra support for laying the new plywood subfloor. I used a handful of these to strap together treated 2x8's to the existing joists. The finish was uniform and the cutting threads sharp, allowing the screws to bite and cut quickly into the wood without pre-drilling pilot holes, and the Torx-30 design guaranteed a fast, slip-free drive to the finish. Ceramic finish coating for use in outdoor and treated-wood applications. Definitely ea...

December 2, 2013
From 5_SLASH_16-in x 3-in Bronze Ceramic Round -Head Exterior Lag screws Verified Purchaser
Was this Review Helpful ?

Good alternative

Would Recommend

Good alternative to galvanized lag bolt in some applications. Make sure you have the correct star bit, otherwise it will not grip and may strip the head when you put some torque on it.

November 25, 2013
Verified Purchaser
Was this Review Helpful ?

Hillman Group Fasteners the best!

Would Recommend

These are excellent quality lag screws, Bronze Ceramic Coat protection for outdoor use, excellent drivability with the T30 star head. The Hillman Group supplies these screws which are very hard to find but Lowes carries these as well as all of The Hillman Group screws and bolts at excellent prices and quantities. Use their screws for any wood project you can dream up.

November 15, 2013
From 5_SLASH_16-in x 3-1_SLASH_2-in Bronze Ceramic Round -Head Exterior Lag screws Verified Purchaser
Was this Review Helpful ?

Great product

Would Recommend

Have only found these at lowes. They make for a great job ..quick fast and strong

September 12, 2013
From 5_SLASH_16-in x 5-in Bronze Epoxy Round -Head Exterior Lag screws Verified Purchaser
Was this Review Helpful ?

Gets the job done easily

Would Recommend

These screws are so much easier to use than traditional lags. No predrilling, just throw on the end of an impact and go. They are good quality steel and have an easy, no slip star head. Saved me a lot of time when building deck and stairs.

July 29, 2013
Verified Purchaser
Was this Review Helpful ?

Perfect for my project

Would Recommend

I needed a way to secure the base of my gazebo to my deck. Since there would be no way to get under the deck and use a nut, this was recommended. It also saved the step of drilling a hole first as the screw is self-tapping. Worked great!

Was this Review Helpful ?

Used instead of 1way's

Would Recommend

Do not recommend 1way security lags...I know its a matter of security but these are easier to install and can be removed if need be, but need power tools and makes crazy noise, and lets face it if people show up w/power tools to rob your house then they gonna get what they came for.

June 29, 2013
From 5_SLASH_16-in x 5-in Bronze Epoxy Round -Head Exterior Lag screws Verified PurchaserVerified Pro
Was this Review Helpful ?

Excellent for use as a Tent Peg

Would Recommend

This product is used by me most often as a tent peg or to hold down something in the ground. During this past winter while in Florida, we had a wind gust of 86 mph and a hanging plant stand did not fall over when being held down by three of these screws. Ofcourse, this is not what they are designed for, but they also work great for screwing large timbers together, after you have predrilled the holes for them.

Was this Review Helpful ?

GARAGE CONSTRUCTION REINFORCEMENT

Would Recommend

This Lag Screw and the others work perfect for my project to re-support my Garage and replace sagging beams. I am now able to use Advanced Framing techniques to build most of the interior and supports. Definitely a value over purchasing Truss screws and components from other manufacturers.

Was this Review Helpful ?

Best Lag Bolt I Ever Used

Would Recommend

A little expensive, but worth every penny. I used 4 of these to hang an articulating television wall mount. The TV (50 inch Hitachi plasma) weighs 117 pounds, and I really didn't want it to take a big crash. I had to go through 2 inches of wallboard and furring strips before I hit the studs, so the length of these was perfect as I wanted as much penetration into the studs without going all the way through. These things are the best thing since sliced bread...screwed into studs very easily with a...

September 3, 2012
From 5_SLASH_16-in x 5-in Bronze Epoxy Round -Head Exterior Lag screws Verified Purchaser
Was this Review Helpful ?

Absolutely great lag screw...

Would Recommend

This is one of the best lag screws on the market. Very easy to use, and will pull treated lumber up tight without just pulling through the wood. Also I haven't had one strip like lags sometimes do.

Was this Review Helpful ?

lag bolt is excellent

Would Recommend

If you need to secure heavy lumber this will do the job

Was this Review Helpful ?

Worlds Toughest Lag Bolt

Would Recommend

I used these lag bolts to bolt 2x4s to my garage wall to build wooden shelves. They powered through the studs with ease and the benefit of these having Torx heads mean that I was able to power these into the wall with ease. In the end, I was able to have over 1000lbs of load on my shelves with a few hundred pound of load to spare. The finish also ensures they will not rust. This lag is worth every penny.

Was this Review Helpful ?

good use in hard wood

Would Recommend

Works very well when lagging hard dense wood to poles. Drills itself and seats very well. must use a 1/2 inch drill with plenty of torque. used this while lagging oak to pressure treaded poles in a post construction barn

Was this Review Helpful ?

Star lag screw

Would Recommend

Very good product with a impact drive will drive clear through any piece of pressure treated lumber rock solid connection Ive used 3" to 6" both without a problem

Was this Review Helpful ?