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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 1,021 Reviews
5 ★
95%
971
4 ★
3%
33
3 ★
1%
12
2 ★
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1 ★
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04/17/2025
JJ
United StatesWife loved it
I purchased the purple iron rose for my wife on our 6th wedding anniversary. She lived the design and workmanship quality as well as the personalized engraving.
With base / No engraving
04/14/2025
AF
United StatesHigh Quality Solid Fire Tools
Unlike cheap stamped flimsy tools, this is the real deal! Shipping seemed slow but the package was extremely well packed. Very happy!
04/15/2025
Old West Iron
Thank you for your review!
04/14/2025
AM
United StatesVintage look with modern ingenuity!
A perfect match for my project! Very good, item as described. Thanks
1 1/2"
04/15/2025
Old West Iron
Thank you for your review!
04/12/2025
JJ
United StatesOld West Iron Completes 300 Year Old Rough Hewn Mantle
Rust and hammered is the perfect way to incorporate new with the old. Old West Iron carriage bolts are every bit as historical as the chestnut antique farmhouse beams. George Washington himself would approve, although he might tell a little white lie the same craftsman made both.
2" x 2"
04/15/2025
Old West Iron
Thank you for your kind review and video. Your mantle looks amazing, we love to see our products used in historical projects!
04/10/2025
RG
United StatesVery pleased
Unique high quality merchandise.
Copper
04/15/2025
Old West Iron
Thank you for your feedback!
04/07/2025
CD
United StatesPlain Straight Iron Latch
Another great product from Old West Iron!
Aged Bronze / Oval Screws
04/15/2025
Old West Iron
Thank you for your feedback, it looks great!
04/06/2025
EK
United StatesCabinet Handle
The raw iron cabinet handle fit perfectly. Adds the right look to the cabinet work.
brushed & oiled / 6"
04/15/2025
Old West Iron
Thank you for your review!
04/06/2025
MG
United StatesAwesome latch
Excellent latch, well made, solid and looks the part.
Thru Bolt
04/15/2025
Old West Iron
Thank you for your review, your door looks great!
03/31/2025
MA
United Statesgreat product, great service
I needed something very specific for a small project. Old West Iron had what I needed! Great quality. And they handled my small order quickly and effectively. Thanks.
Black / Smooth
03/31/2025
Old West Iron
Thank you for your feedback!
03/30/2025
JG
United StatesAwesome service!
Product is perfect. People are better. What else do you need?
03/31/2025
Old West Iron
Thank you for your kind words!
03/28/2025
A
United StatesVery Nice
This bathroom set was just what I was hoping for. These are strong and sturdy and the bronze finish looks great. I think it took about 3 weeks from placing my order to the package arriving at my door.
03/31/2025
Old West Iron
Thank you for your feedback!
03/27/2025
I
United StatesInfinity heart sculpture is great, arrived within stated time frame and looks just like pics
03/26/2025
RB
United StatesGreat customer service
Loved the washers I ordered, Very high quality. Customer service called me and verified the details shortly after I ordered. Personal touch is appreciated. I will use them again.
1" x 1" Square
03/31/2025
Old West Iron
Thank you for your feedback!
03/20/2025
MG
United StatesThe screws were perfect for my project. Thanks so much !
My experience was fantastic.
03/31/2025
Old West Iron
Thank you for your feedback!
03/19/2025
NC
United StatesGood customer service
Products are well made.
03/31/2025
Old West Iron
Thank you for your feedback!
03/19/2025
I
United KingdomExcellent product and service, thanks