3/8" Square Head Bolts – 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
For The Home
Outdoor Living
Gifts & Misc
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
For The Home
Outdoor Living
Gifts & Misc
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

5 products

Filter

0 selected

Bolt (5)

0 selected

3/4" (5)
1" (5)
1 1/4" (5)
1 1/2" (5)
1 3/4" (5)
2" (5)
2 1/4" (5)
2 1/2" (5)
2 3/4" (5)
3" (5)
3 1/2" (5)
4" (5)
4 1/2" (5)
5" (5)
5 1/2" (5)
6" (5)

0 selected

Fancy / Other (1)
Square (1)

0 selected

3/8" (5)

0 selected

Hammered (1)
Pyramid (1)
Smooth (2)

Filter

5 products

0 selected

Bolt (5)

0 selected

3/4" (5)
1" (5)
1 1/4" (5)
1 1/2" (5)
1 3/4" (5)
2" (5)
2 1/4" (5)
2 1/2" (5)
2 3/4" (5)
3" (5)
3 1/2" (5)
4" (5)
4 1/2" (5)
5" (5)
5 1/2" (5)
6" (5)

0 selected

Fancy / Other (1)
Square (1)

0 selected

3/8" (5)

0 selected

Hammered (1)
Pyramid (1)
Smooth (2)

Apply (0)

3/8" Dia. Smooth Square Head Bolt - Old West Iron

Image alt

Image alt

Image alt

32853563048039

3/8" Dia. Smooth Square Head Bolt

(3)

From $1.19 USD

Unit price

Available for pickup at

Out of stock at

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

Image alt

Image alt

Image alt

32853563834471

3/8" Dia. Hammered Square Head Bolt

(3)

From $2.59 USD

Unit price

Available for pickup at

Out of stock at

3/8" Dia. Pyramid Square Head Bolt - Old West Iron

Image alt

Image alt

Image alt

32853564358759

3/8" Dia. Pyramid Square Head Bolt

(4)

From $2.71 USD

Unit price

Available for pickup at

Out of stock at

3/4" Dia. Forged Cross Head Bolt - Old West Iron

Image alt

Image alt

Image alt

41771753832551

3/8" Dia. Forged Cross Head Bolt

(1)

From $5.96 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

42372299358311

3/8" Dia. Distressed Square Head Bolt

(0)

From $2.29 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, Bolts and Carriage Bolts - Old West Iron

Lag Screws, Bolts and Carriage Bolts

Machine Bolts (Threaded to Receive Nut)

Machine Bolts (Threaded to Receive Nut)

Square Plate Washer - Old West Iron

OWI Hand Forged Products

3/8" Dia. Smooth Square Head Bolt - Old West Iron

Smooth Square Head Bolts

Square Head Bolts

Square Head Bolts

Square Plate Washer - Old West Iron

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

English (USD $)

Language

English

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

Currency

United States (USD $)

© 2026, Old West Iron.

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