SKU: 37905600797

Hillman 3/8 in. x 3-1/2 in. Hot-Dipped Galvanized Steel Carriage Bolts, 50-Pack

Sale price$44.09 Regular price$48.99
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Description

Hillman 3/8 in. x 3-1/2 in. Hot-Dipped Galvanized Steel Carriage Bolts, 50-PackHillman Galvanized 3 8" x 3 1 2" Carriage Bolts (50 Pack) Durable hot dipped galvanized steel carriage bolts for fastening wood to wood or metal with a clean, low profile finish. The square shoulder locks into material for secure, washer free installation and coarse threads ensure reliable grip in outdoor or high moisture environments. Key Features: Rust Resistant Protection: Hot dipped galvanized finish delivers superior corrosion resistance for

Hillman Galvanized 3/8" x 3-1/2" Carriage Bolts (50-Pack)

Durable hot-dipped galvanized steel carriage bolts for fastening wood to wood or metal with a clean, low-profile finish. The square shoulder locks into material for secure, washer-free installation and coarse threads ensure reliable grip in outdoor or high-moisture environments.


Key Features:

  • Rust-Resistant Protection: Hot-dipped galvanized finish delivers superior corrosion resistance for exterior use
  • Secure Hold: Square shoulder locks into wood for anti-rotation and eliminates the need for a flat washer
  • Clean, Low-Profile Finish: Smooth domed head sits semi-flush where space is tight
  • Reliable Threading: Coarse SAE threads provide strong engagement in wood and metal
  • Sized for Versatility: 3/8 in. diameter x 3-1/2 in. length, 50 bolts per boxed pack

Specifications Table:

Specification Details
Brand Hillman
Finish Hot Dipped Galvanized
Material Steel
Diameter 3/8 inch
Length 3-1/2 inch
Thread Type Coarse
Unit of Measurement SAE
Grade 2
Head Style Carriage, domed head
Number in Package 50
Packaging Type Boxed

Frequently Asked Questions (FAQ):

Q: What materials can these carriage bolts be used with?
A: They are designed to fasten a wooden face to either a wood or metal frame.


Q: Do I need a washer under the head?
A: No— the square shoulder bites into the material and prevents rotation, eliminating the need for a flat washer under the head.


Q: Is pre-drilling required?
A: Yes, drill a hole matching the 3/8 in. diameter for proper fit and installation.


Q: Are these suitable for outdoor applications?
A: Yes, the hot-dipped galvanized finish offers excellent rust resistance for exterior and high-moisture environments.


Q: What thread type do these bolts use?
A: They feature coarse SAE threads.


Crisp, Galvanized Hardware for Clean, Cohesive Builds

These carriage bolts bring a refined, utilitarian elegance to outdoor structures and rustic interiors alike. The domed head offers a subtle, polished detail while the galvanized finish harmonizes with weathered woods and industrial metals. Use them to unify deck railings, garden gates, or exposed timber joinery for a tailored, cohesive look. A must-have detail for achieving durable, design-forward craftsmanship.


Upgrade your project with galvanized reliability—add this 50-pack of Hillman carriage bolts 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: 37905600797

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Anjelica
Massapequa, US
★★★★★ 4
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This is a really good toy overall, especially if you have dogs that love to chew. My dogs were immediately into it—they play with it nonstop, toss it around, and stay entertained for a while, which I love. It definitely holds up better than most toys we’ve tried. The only reason I’m giving it 4 stars instead of 5 is because over time it does start to fray a bit and gets a little rough, especially with heavy chewing. It’s not completely indestructible, but it still lasts longer than a lot of other toys. Overall, still a great buy and I would recommend it if your dogs need something tough but fun!
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Reviewed in the United States on April 4, 2026
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Lina
Pawtucket, US
★★★★★ 5
Worthwhile!
Size: Medium/Large, Color: Turkey Day Drumstick - Large
I have a small dog with a really strong bite! Usually have to buy toys that are meant for bigger dogs. This has lasted us for what feels like forever. It does sound very heavy when dropped! My dog loves it though! Would definitely recommend!
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Reviewed in the United States on May 2, 2026
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Kelly
Charlottesville, US
★★★★★ 5
Ohhh Mr. Iguana
Size: Medium/Large, Color: Illana the Iguana - Large
Mr. Iguana is a house favorite! I got my first one of these in a barkbox and my dog loved it so much, i went on the hunt for another one. Amazon saved the day! I own about 7 of these now. They are prefect for dogs just love to chew, they hold up great! And they are heavy duty, super easy to clean! My dogs are very happy, great value for the money! Doesn't have a smell, vibrant colors! Noise level is quiet, minus my dogs chewing !
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Reviewed in the United States on August 13, 2025
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sec682
Natrona Heights, US
★★★★★ 3
Not for strong chewers
Size: Medium/Large, Color: Dog Ness Monster - Large
Initially, I really liked this for my dog. She is about 8 months old and still loves to chew and destroys most toys in a few minutes. When we got this, it seemed like it would hold up for a while despite being clearly gnawed on. Unfortunately, once she focused on the softer "water" portion of the toy, that is where things went downhill with this toy. After a few short chew sessions, she was tearing chunks out of it. We had purchased a replacement since she liked the original so much, and after about 5 minutes with the replacement, she had taken enough out of the blue section that we immediately threw that one out as well. Overall while the green portion held up, the blue didn't. I can't recommend this for strong chewers.
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Reviewed in the United States on December 8, 2025
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Gary Hugo
Phoenix, US
★★★★★ 4
Definitely not indestructable
Size: Medium/Large, Color: Dog Ness Monster - Large, Size: Medium/Large, Color: Dog Ness Monster - Large
I have a 1-year-old toy fox terrier (Rocky, pictured). He has been chewing on this toy for seven months now; it is one of his favorites. He has been unable to seriously damage the "ocean" portion of this toy, but as you can see from the provided image, the sea serpent has not faired that well. It is missing its snout and smaller portions of the humps. My guess is that the advertiser images showing much larger dogs with "like new" versions of the toy are just that...NEW AND UNCHEWED. I have not had to clean up bits of this toy from my floor, so I assume Rocky has been swallowing them. My hope is that the yellow material of the serpent is not chemically dangerous when exposed to digestive fluids. Rocky easily destroys plush toys in a matter of days if not hours and, consumed pieces of a small microfiber blanket that he liked to toss around and play tug-of-war with (past tense as he destroyed it and has since been trashed after I began finding feces-stained undigested pieces of it lying around). Since this toy has survived seven months and has remained recognizable, I have to agree it is durable. Just beware, if my small toy fox terrier can damage the toy as pictured, expect your large breed chewer to do similar or worse damage. Also, the toy is very heavy! When Rocky drops it down a flight of stairs, it makes a MAJOR thud at the bottom, and sometimes makes me wonder if it might crack the large tile at the bottom. I cautiously recommend the product. Note the yellow frisbee in Rocky's picture. It is only a few months old and surprisingly has not suffered any chew damage despite substantial abuse. It appears to bend in the wind like a proverbial reed, evading damage by yielding to pressure.
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Reviewed in the United States on July 5, 2024

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