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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"
Customer Reviews
4.9 Based on 1,062 Reviews
5 ★
95% 
1012
4 ★
3% 
33
3 ★
1% 
12
2 ★
0% 
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Filter Reviews:
07/22/2025
TB
Trey B.
United States

Always 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!

07/15/2025
RH
Roy H.
United States

Happy 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.

Old West Iron  Review
07/17/2025

Old West Iron

Thank you for your review! Your corbels look absolutely gorgeous,excellent work.

07/07/2025
BH
Bruce H.
United States

High 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.

Old West Iron  Review
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
Annette O.
United States

Never 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

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