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Hillman 3/8-in x 1-1/2-in Stainless Coarse Thread Interior/Exterior Carriage Bolt

Name: Hillman 3/8-in x 1-1/2-in Stainless Coarse Thread Interior/Exterior Carriage Bolt
Brand: Hillman
SKU: 3056673
Price: 1.75 USD
Rating: 4.6 (107 reviews)

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4.6

107

Length Measurement: 1-1/2-in

Bolt Diameter: 3/8-in

1/2-in

1/4-in

3/8-in

5/16-in

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Carriage bolts feature a smooth, dome shaped head, without an external drive for appearance, safety and security. Underneath the head is a square section that is the same diameter as the threaded portion of the bolt, allowing the bolt to be installed with just a single tool. Pre-drilled holes are required for installation.

Carriage bolts are designed to fasten a wooden face to either wood or metal
Stainless steel finish provides superior rust prevention, making it terrific for outdoor applications
Install by pushing the carriage bolt through a pre-drilled hole, secure placement with hex nuts and washers
Common applications include security fixings, decking, fencing, furniture, outdoor play equipment; places where the bolt must only be removable from one side
The self-locking square section on the underside of the head pulls into the wooden material as hex nuts are tightened, eliminating spinning after installation

General
Finish	Stainless	Unit of Measure	Count
Manufacturer Color/Finish	Stainless steel	Measure Type	Standard (SAE)
Material	Steel	Thread Type	Coarse
Package Quantity	1	Fastener Speed Code	GBF
Use Location	Interior/Exterior

Dimensions
Bolt Diameter	3/8-in	Length Measurement	1-1/2-in

Features
Bolt Thread Pitch	16

Warranty
Warranty	None

Certifications
ACQ Approved	Yes	CA Residents: Prop 65 Warning(s)	No

Miscellaneous
UNSPSC	31161600

Check out the Best Selling Carriage Bolts on Lowes.com

Review

4.6 out of 5

107 Reviews

83% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The stainless steel hardware products were generally well-received, with many customers finding them to be of good quality, rust-resistant, and suitable for outdoor projects. However, some reported issues with limited selection, difficulty tightening or loosening the bolts, and concerns about corrosion. Overall, the products can be a good choice for outdoor use, but careful selection and checking the fit is recommended to ensure a positive experience.

Customer review summary generated by AI, including incentivized reviews.

108 Customer Reviews

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Customer Sentiment

Customer liked

It’s reliable hardware

It had a smooth finish and suited the job at hand.

EdestoApril 2, 2026
From 3_SLASH_8-in x 3-1_SLASH_2-in Stainless Coarse Thread Exterior Carriage Bolt Verified Purchaser

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Stainless

Would Recommend

Works

GrizMarch 21, 2026
From 5_SLASH_16-in x 2-1_SLASH_2-in Stainless Coarse Thread Interior_SLASH_Exterior Carriage Bolt Verified Purchaser

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Good price for stainless.

Would Recommend

Great for use with treated lumber. Stainless reduces the corrosion. Good price. Exactly what I wanted.

SimpsonFebruary 18, 2026
Verified Purchaser

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Several bolts are different lengths

Would Not Recommend

Too long for their purpose, had to cut them to fit because Lowes doesn’t carry the correct size.

DisgruntledNovember 16, 2025
Verified Purchaser

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Response from Customer Service@Hillman

Hello, We’re sorry to hear that this product was unsatisfactory and did not meet or perform to your expectations. We will continue to monitor product...

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Hillman 3/8-in x 1-1/2-in Stainless Coarse Thread Interior/Exterior Carriage Bolt

Shop Hillman

Pickup

Shipping

Delivery

Overview

Product Features

Specifications

General

Finish

Unit of Measure

Manufacturer Color/Finish

Measure Type

Material

Thread Type

Package Quantity

Fastener Speed Code

Use Location

Dimensions

Bolt Diameter

Length Measurement

Features

Bolt Thread Pitch

Warranty

Warranty

Certifications

ACQ Approved

CA Residents: Prop 65 Warning(s)

Miscellaneous

UNSPSC

What Customers Are Saying

Community Q & A

12 Questions

12 Questions

Hillman: Featured Videos

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Deals by Department

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Hillman 3/8-in x 1-1/2-in Stainless Coarse Thread Interior/Exterior Carriage Bolt

Shop Hillman

Pickup

Shipping

Delivery

Overview

Product Features

Specifications

Community Q & A

Hillman: Featured Videos

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