3/8" Square Head Lag Screws – Old West Iron

Skip to content

Free Shipping for domestic orders over $100 · Hand-forged in the USA · Orders start at $25

Search...

Search...

Fasteners
Builder Supplies
Door Hardware
Oven & Fireplace
For The Home
Misc & Outdoor
Shop by Design Style
Help Center

Welcome to Old West Iron

Main menu

Fasteners
Builder Supplies
Door Hardware
- Door Hardware
- Handles, Knobs & Knockers
  Handles, Knobs & Knockers
- Hinges and Hinge Straps
  Hinges and Hinge Straps
- Latches, Locks & Cane Bolts
  Latches, Locks & Cane Bolts
- Speakeasy Doors & Grills
  Speakeasy Doors & Grills
- Decorative Straps & Kickplates
  Decorative Straps & Kickplates
Oven & Fireplace
- Oven & Fireplace
- Standard Size Pizza Oven Doors
  Standard Size Pizza Oven Doors
- Pizza Oven Doors for Existing Ovens
  Pizza Oven Doors for Existing Ovens
- XL Pizza Oven Doors
  XL Pizza Oven Doors
- Fireplace
  Fireplace
- Pizza Oven Accessories
For The Home
Misc & Outdoor
- Misc & Outdoor
- Decor, Signs & Cutouts
  Decor, Signs & Cutouts
- Garden & Yard
  Garden & Yard
- Miscellaneous
- Seasonal / Gifts
  Seasonal / Gifts
Shop by Design Style
Help Center

Your cart

Your cart is empty

Continue shopping

office@oldwestiron.com
(+1) 844-205-7266

(+1) 844-205-7266
office@oldwestiron.com

4 products

Filter

0 selected

Lag (4)

0 selected

1" (4)
1 1/4" (4)
1 1/2" (4)
2" (4)
2 1/2" (4)
3" (4)
3 1/2" (4)
4" (4)
4 1/2" (4)

Filter

4 products

0 selected

Lag (4)

0 selected

1" (4)
1 1/4" (4)
1 1/2" (4)
2" (4)
2 1/2" (4)
3" (4)
3 1/2" (4)
4" (4)
4 1/2" (4)

Apply (0)

3/8" Dia. Smooth Square Head Lag

Image alt

Image alt

Image alt

43731274563687

3/8" Dia. Smooth Square Head Lag

(0)

From $0.85 USD

Unit price

Available for pickup at

Out of stock at

3/4" Dia. Pyramid Square Head Bolt - Old West Iron

Image alt

Image alt

Image alt

43731261620327

3/8" Dia. Pyramid Square Head Lag

(0)

From $2.05 USD

Unit price

Available for pickup at

Out of stock at

1/2" Dia. Distressed Square Head Lag - Old West Iron

Image alt

Image alt

Image alt

43731267190887

3/8" Dia. Distressed Square Head Lag

(0)

From $2.00 USD

Unit price

Available for pickup at

Out of stock at

3/8" Dia. Hammered Square Head Lag - Old West Iron

43731264208999

3/8" Dia. Hammered Square Head Lag

(0)

From $2.00 USD

Unit price

Available for pickup at

Out of stock at

Explore Related Collections

Black Friday Sale

Black Friday Sale

Fasteners - Old West Iron

Lag Screws /Lag Bolts (Pointed Tip)

Lag Screws /Lag Bolts (Pointed Tip)

Lag Screws, Bolts and Carriage Bolts - Old West Iron

Lag Screws, Bolts and Carriage Bolts

Square Plate Washer - Old West Iron

OWI Hand Forged Products

Square Head Lag Screws

Square Head Lag Screws

Square Plate Washer - Old West Iron

Traditional Square Head Lag Screws

Traditional Square Head Lag Screws

Need Help?

Call: 844-205-7266

Rosie is available 24/7 to answer questions and take messages.

Live Support Hours:
Mon–Thurs, 8 AM–1:30 PM (MST)

Text/SMS: (208) 904-6820

Email: office@oldwestiron.com

Physical Address:

Old West Iron
5511 W 10500 N
Felt, ID 83424
USA

Shop Old West Iron

Fasteners
Builder Supplies
Door Hardware
Pizza Oven & Fireplace
For The Home
Misc & Outdoor
Shop By Design Style
Textures & Finishes
Visual Index

Information

About Us
Our Story
How its Made
Contact Us
Old West Iron's Blog
Expert Guides & Installation Tips
Frequently Asked Questions
Shipping Information
Installation Guide
Order Processing & Lead Times

Our Policies

Returns
Privacy Policy
Terms of Service
Terms & Conditions
Site Map
Warranty
Minimum Order Policy

Get Exclusive Offers & Updates

Join our newsletter for new product releases, expert installation guides, seasonal deals, and early access to limited-run handcrafted hardware. No spam—just the good stuff.

Your email

Email is invalid

Tiếng Việt (USD $)

Language

Tiếng Việt

English
Español
français
Deutsch
日本語
Italiano
العربية
Tiếng Việt
português (Brasil)
Gàidhlig
한국어
Nederlands
Polski
svenska
繁體中文

Currency

Hoa Kỳ (USD $)

© 2026, Old West Iron.

Choosing a selection results in a full page refresh.
Opens in a new window.