Hillman 3/8 in. x 5-1/2 in. Zinc-Plated Steel Carriage Bolt, 50-Pack
SKU: 62417333472

Hillman 3/8 in. x 5-1/2 in. Zinc-Plated Steel Carriage Bolt, 50-Pack

Sale price$43.19 Regular price$47.99
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

Hillman 3/8 in. x 5-1/2 in. Zinc-Plated Steel Carriage Bolt, 50-PackHillman Zinc Plated 3 8 in. x 5 1 2 in. Carriage Bolts (50 Pack) Durable zinc plated steel carriage bolts ideal for wood and metal fastening. Coarse thread Grade 2 bolts with round heads provide smooth, secure installs in structural and DIY projects. Key Features: Zinc Plated Protection: Corrosion resistant finish for indoor outdoor use Strong Steel Construction: Grade 2 steel suitable for general fastening applications Clean Round Head Design:

Hillman Zinc-Plated 3/8 in. x 5-1/2 in. Carriage Bolts (50-Pack)

Durable zinc-plated steel carriage bolts ideal for wood and metal fastening. Coarse-thread Grade 2 bolts with round heads provide smooth, secure installs in structural and DIY projects.


Key Features:

  • Zinc-Plated Protection: Corrosion-resistant finish for indoor/outdoor use
  • Strong Steel Construction: Grade 2 steel suitable for general fastening applications
  • Clean Round Head Design: Smooth, low-profile head for a finished look
  • Coarse Threads: Reliable grip in wood and metal with standard SAE threading
  • Bulk Value Pack: 50 boxed bolts for jobsite or workshop efficiency

Specifications Table:

Specification Details
Diameter 3/8 in.
Length 5-1/2 in.
Material Steel
Finish Zinc-Plated
Head Style Round
Thread Type Coarse (UNC)
Grade Grade 2
Unit of Measurement SAE
Packaging Type Boxed
Number in Package 50
Model 57187
Brand Hillman
Product Type Carriage Bolt
Weight 7.9 lbs

Frequently Asked Questions (FAQ):

Q: What nut size fits these bolts?
A: Use standard 3/8 in. coarse-thread (UNC) nuts and washers.


Q: Are these suitable for outdoor use?
A: Yes, the zinc-plated finish offers corrosion resistance for general outdoor applications; for harsh environments consider galvanized or stainless.


Q: Do they include nuts or washers?
A: No, this pack contains bolts only; nuts and washers are sold separately.


Q: What is the thread type?
A: Coarse UNC thread, compatible with SAE hardware.


Q: Can these be used in wood?
A: Yes, carriage bolts are commonly used in wood; the square neck locks into the wood to prevent turning during tightening.


Streamlined Strength with Polished Simplicity

These zinc-plated carriage bolts bring a refined, industrial clarity to any build—sleek round heads that read as clean, intentional hardware. The crisp metallic finish punctuates wood grains and painted surfaces with a subtle glint. Pair them with matte black brackets for contrast or echo the shine with brushed nickel accents. A small detail that elevates cabinetry, furniture, and architectural moments into a quietly luxurious statement.


Upgrade your projects with durable, zinc-plated Hillman carriage bolts—add this 50-pack to your cart today.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 62417333472

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4.1 ★★★★★
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Product Reviews
M
Verified Purchase
Mark B.
Lexington, US
★★★★★ 4
Got what I paid for.
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
I dropped my drill with the bit installed. It broke quite easily. It was a relatively inexpensive so I can't complain. A higher quality harder metal would have earned 5 stars.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2025
A
Verified Purchase
Amazon Customer
Chelsea, US
★★★★★ 5
Great product
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
These bits are great. We use them every day e when patching or plugging tires. Having multiple sizes helps us match the bit to the patch we use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
M
Verified Purchase
Monty W. Parks
Charlottesville, US
★★★★★ 5
Easy on the hands
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
These make it much easier to ream tires that have been punctured. It takes the stress off of your hands, forearms and elbows especially when you’re plugging higher ply tires.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2025
M
Verified Purchase
Manny
Belleville, US
★★★★★ 5
Handy Tool for Frequent Flat Tire Repairs
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
Good quality and easy to use. As someone involved in emergency services, we deal with flat tires often, and this tool has been really helpful. The bits are sharp, durable, and make the repair process quicker and cleaner. Great to keep on hand for regular use or in a roadside kit.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 14, 2025
J
Verified Purchase
Jeremiah
Whiting, US
★★★★★ 5
Tire repair done right
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
Works well, for my high volume automotive repair store.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 28, 2025

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