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3/8" Square Head Lag Screws
Add a touch of timeless craftsmanship to your projects with our 3/8" Square Head Lag Screws, hand-forged from durable iron by skilled blacksmiths. These authentic, artisan-crafted screws combine strength with rustic charm, bringing character and functionality to every application. Whether you're building custom furniture, hanging vintage-style signs, or working on restoration projects, these lags provide both reliability and aesthetic appeal.
Designed for creators who value quality and detail, each screw showcases the distinct markings of expert blacksmithing—making every piece a unique work of art. Beyond their beautiful design, these lag screws offer superior durability, ensuring your projects are built to last. Perfect for adding that authentic, handmade look to tables, doors, cabinetry, and more, they’re the ideal finishing touch for anyone passionate about fine craftsmanship.
Choose tools that match the pride you take in your work. With our 3/8" Square Head Lag Screws, you’ll turn every build into a masterpiece.
- Head Shape: Square
- Head Size: 9/16"
- Socket Size: 9/16" 8-Point
- Head Height: 1/4"
- Shank Diameter: 3/8"
- Thread Pitch: 7
- Pilot Hole: soft wood 11/64"
- Pilot Hole: hard wood 1/4"
Tool Talk:
Everything You Need to Know About Lag Bolts
If you are a DIYer, then you have probably heard of lag bolts. But what are these exactly? Here's everything you need to know about this fastener.
Top 12 Uses of Lag Bolts and Decorative Bolts for Your Home Decor
Looking for the best lag bolts and decorative bolts to spruce up your home decor? Then check out some of these examples that might be perfect for you.
Hammered Lag Bolts Vs. Smooth: Which Is Right for You?
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Customer Reviews
4.9 Based on 1,062 Reviews
5 ★
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1012
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3 ★
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07/22/2025
TB
United StatesAlways a pleasure
We have a Spanish home built in the 20’s we are restoring. The quality of your products and their authentic nature are second to none and we love them. Thank you!
3"
07/15/2025
RH
United StatesHappy Wife - Happy Life
I purchase your pyramid head #10 wood screws. They go well with our antique corbels on our island bar. Worth the search and price. Thanks.
1"
07/17/2025
Old West Iron
Thank you for your review! Your corbels look absolutely gorgeous,excellent work.
07/07/2025
BH
United StatesHigh Quality Unique Finishing Products
As someone who likes to remodel and build without contractor help, these products set my projects above the rest. People come over to my house and ask who did the work. I tell them I did but with the help of real black smiths out west.
24" - 35" / 1 9/16"
07/10/2025
Old West Iron
How stunning! Thank you for the kinds words and your support for a small business from the Teton Mountains!
07/01/2025
AO
United StatesNever got my order
Hello, I have never gotten my order. I am very concerned about what is going on and then when I use Paypal to pay or a credit card then I am really upset. Contact
07/03/2025
Old West Iron
Hey there, I am so glad we spoke on the phone and had the chance to explain our process and how everything is hand made. As a small family owned business, we make everything to order vs big corporations that have warehouses ready to go. We appreciate you for understanding and thank you for supporting a small American Business
06/30/2025
MM
United StatesM2
Pauline did a great job helping me with my requirements. The product is excellent and came in the mail quickly.
07/03/2025
Old West Iron
We are so happy to hear that you had wonderful customer service and love your products. Let us know if there are any other projects we can help you with.
06/29/2025
JL
United StatesBeautiful straps
I built a hickory door for our new cabin in Lake Tahoe, the distressed straps were the key element to make it outstanding. Also the bolts were perfect. Now I want to order a speakeasy to complete the project. Thank you. Jerry
34"
07/03/2025
Old West Iron
We are so glad you were able to tie our products in to your beautiful cabin! Be sure to send all the pictures!
06/22/2025
SM
United StatesGreat square head lags
Old West Iron was professional and prompt with the smooth square head lag screws.
06/24/2025
Old West Iron
It was a pleasure to help you on your project Mr. Maynard. Let u know if you have any other projects in mind!
06/21/2025
MW
United StatesIron push plate
Super nice people, great products, quick turnaround!! Wonderful iron push plate!! We have a rustic log house and it is absolutely beautiful on our front door!
10" / 3 1/4"
06/23/2025
Old West Iron
Mrs. Marilee, we appreciate your kind words! Hope to see you in the Valley!
06/20/2025
DJ
United StatesBeautiful workmanship
I had a very good experience. The Fleur Di Lis Straight Iron Plate was exactly as pictured as described. It was perfect for my application, and very well made. I had a small problem with my order, but the customer service was very responsive. They resolved the issue quickly and easily. I would highly recommend Old West Iron.
06/23/2025
Old West Iron
We are so glad to hear that you enjoyed your product. We are excited to be involved in your next project.
06/20/2025
FK
United StatesNever received my order
I never received this product. I would like to receive it until then I can’t order anything else. I don’t want to keep losing money
06/23/2025
Old West Iron
Mr. Fred, While we understand your frustration, it appears you only ordered our Digital - Support for Groundbreaking Carbon Removal Technologies. Which we thank you for. However, if you would like to place a new item for any hardware or a custom iron piece, please feel free to call us anytime.
06/19/2025
MM
United StatesLove It!
Looks as advertised. Wife loves it for our anniversary gift
06/20/2025
Old West Iron
Cheers! We are so happy to have been part of your very special day
06/18/2025
RC
United StatesPerfect fit, looks great, did not chip during installation
Needed a very small order (4 nuts) to finish our new railing base installation. Made sure of the size at HD, and they provided the correct part. Installed gently with ratchet, and nuts did not chip or lose color. Will definitely come here for next special project.
Black / Smooth
06/20/2025
Old West Iron
Thank you so much for the thoughtful note—and for including a photo! It’s always a treat to see our hardware in action, especially when it’s the final touch on a great project. We’re glad the finish held up just right and can’t wait to be part of your next one.
06/18/2025
CB
United StatesEven Better in Person
The photos don't quite capture how pretty the flowers are, especially the gold stem wrapping around the heart. It was even better than I hoped, and it made a fantastic anniversary gift!
Natural Black Iron / 13-24 characters
06/19/2025
Old West Iron
Thank you so much for your feedback, happy anniversary!
06/17/2025
CD
United StatesOutstanding
Superior craftsmanship! One of a kind piece that stops people in their tracks.
6" x 6"
06/19/2025
Old West Iron
Thank you so much for your feedback!
06/16/2025
GB
United StatesD Ring Anchor Plate - Hammered, black finish - excellent fit, finish and workmanship
We bought this D Ring to compliment the Beam Straps we had recently received/installed. We were so impressed with the Beam Strap's workmanship, fit and finish. They were exactly to spec and really elevated the appearance of our ceiling beams. SO we ordered the D Ring Anchor plate for an adjacent room and are just as impressed. The heft and workmanship of the hammered plate and D Ring finish looks so authentic. Highly recommend Old West Iron !
8" x 8"
06/15/2025
MM
United StatesQuality, Quality, Quality and more
I love the strongness of the steel and the color of the bronze is really a rich depth that brought out my cherry cabinets. The copper was really pretty and I believe it would flatter a white or black cabinet or lighter wood. I purchased a sample and it took a while, but ok as I made an proper order to fulfill all my cabintry of the kitchen. Thank you for making a quality product.