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Hillman 3/8-in x 3-1/2-in Zinc-Plated Coarse Thread Hex Bolt

Name: Hillman 3/8-in x 3-1/2-in Zinc-Plated Coarse Thread Hex Bolt
Brand: Hillman
SKU: 3012107
Price: 1.78 USD
Rating: 4.6 (128 reviews)

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4.6

128

Length Measurement: 3-1/2-in

Bolt Diameter: 3/8-in

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Hex bolts feature hexagonal heads and machine threads for use with a nut or in a tapped hole. They can be used to fasten wood to wood, wood to metal or metal to metal applications. Be sure to use washers and nuts that are the same grade and finish as the hex bolt. Pre-drilled holes are required.

Hex bolts are machine bolts designed to fasten facing pieces of wood and/or metal
Grade 5 zinc-plated steel offers high corrosion resistance
Pre-drill a pilot hole the same diameter as the hex bolt you are using
Commonly used in home and commercial projects involving wood-to-wood and wood-to-metal connections
Partially threaded shank allows for a stronger grip between objects and less shear movement

General
Finish	Zinc-plated	Unit of Measure	Count
Manufacturer Color/Finish	Silver	Head Type	Hex
Material	Steel	Measure Type	Standard (SAE)
Package Quantity	1	Thread Type	Coarse
Grade	5

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

Features
Bolt Thread Pitch	16	Full Thread	No

Warranty
Warranty	None

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

Miscellaneous
UNSPSC	31161600

Check out the Best Selling Hex Bolts on Lowes.com

Review

4.6 out of 5

128 Reviews

88% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The bolts are generally considered a good quality product that is easy to use and works well for various purposes like mounting solar lights, fixing patio furniture, and securing equipment. While some customers experienced issues with threading or the bolts breaking, the majority of customers were satisfied with the product's reliability and functionality. The pricing was also noted as competitive compared to similar parts.

Customer review summary generated by AI, including incentivized reviews.

128 Customer Reviews

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Customer Sentiment

Customer liked

Solid Bolts

Good

RickyTickMarch 29, 2026
From 3_SLASH_8-in x 1-1_SLASH_2-in Zinc-Plated Coarse Thread Hex Bolt (2-Count) Verified Purchaser

Was this Review Helpful ?

Good selection of harware

Would Recommend

Available when I needed it.

WarrenMarch 20, 2026
From 7_SLASH_16-in x 2-in Zinc-Plated Coarse Thread Hex Bolt (2-Count) Verified Purchaser

Was this Review Helpful ?

Good Quality

Would Recommend

Quality is good

FedUpFebruary 21, 2026
From 1_SLASH_4-in x 1-1_SLASH_2-in Zinc-Plated Coarse Thread Hex Bolt (4-Count) Verified Purchaser

Was this Review Helpful ?

They're bolts.

Would Recommend

Standard bolts, hold things together

MattJanuary 26, 2026
From 1_SLASH_4-in x 3_SLASH_4-in Zinc-Plated Coarse Thread Hex Bolt (5-Count) Verified Purchaser

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Hillman 3/8-in x 3-1/2-in Zinc-Plated Coarse Thread Hex Bolt

Shop Hillman

Pickup

Shipping

Delivery

Overview

Product Features

Specifications

General

Finish

Unit of Measure

Manufacturer Color/Finish

Head Type

Material

Measure Type

Package Quantity

Thread Type

Grade

Dimensions

Bolt Diameter

Length Measurement

Features

Bolt Thread Pitch

Full Thread

Warranty

Warranty

Certifications

ACQ Approved

CA Residents: Prop 65 Warning(s)

Miscellaneous

UNSPSC

What Customers Are Saying

Community Q & A

4 Questions

4 Questions

Hillman: Featured Videos

RELATED SEARCHES

Deals by Department

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Hillman 3/8-in x 3-1/2-in Zinc-Plated Coarse Thread Hex Bolt

Shop Hillman

Pickup

Shipping

Delivery

Overview

Product Features

Specifications

Community Q & A

Hillman: Featured Videos

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