Hillman 3/8 in. x 2-1/2 in. Zinc-Plated Steel Carriage Bolt, 50-Pack
SKU: 35316531754

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

Sale price$19.79 Regular price$21.99
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Description

Hillman 3/8 in. x 2-1/2 in. Zinc-Plated Steel Carriage Bolt, 50-PackZinc Plated Steel Carriage Bolt, 3 8 in. x 2 1 2 in. (50 Pack) Durable Hillman carriage bolts made of zinc plated steel for rust resistant fastening in wood to wood or wood to metal projects. The round head and square neck provide a secure, semi flush finish without a washer, ideal for structural and furniture applications. Key Features: Rust Resistant Finish: Zinc plating helps resist corrosion and delivers a clean, consistent look Secure Hold:

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

Durable Hillman carriage bolts made of zinc-plated steel for rust-resistant fastening in wood-to-wood or wood-to-metal projects. The round head and square neck provide a secure, semi-flush finish without a washer, ideal for structural and furniture applications.


Key Features:

  • Rust-Resistant Finish: Zinc plating helps resist corrosion and delivers a clean, consistent look
  • Secure Hold: Square neck locks into wood to prevent spinning during installation
  • Semi-Flush Appearance: Low-profile round head minimizes the need for washers
  • Versatile Use: Suitable for wood-to-wood or wood-to-metal connections
  • Bulk Value: Convenient 50-pack for projects and jobsite replenishment

Specifications Table:

Specification Details
Material Zinc-plated steel
Finish Zinc-Plated
Diameter 3/8 in
Length 2-1/2 in
Thread Type Coarse
Grade 2
Unit of Measurement SAE
Packaging Type Boxed
Number in Package 50
Head Style Round head with square neck (carriage bolt)
Weight 4.5 lb (pack)
Brand Hillman

Frequently Asked Questions (FAQ):

Q: What tools do I need to install these carriage bolts?
A: Use a drill to create a pilot hole and a wrench or socket for the nut; the square neck locks into the wood so a driver on the head is not required.


Q: Are these bolts suitable for outdoor use?
A: The zinc plating offers basic rust resistance; for harsh outdoor environments, consider hot-dipped galvanized or stainless steel options.


Q: What thread type do these bolts use?
A: They feature coarse threads compatible with standard SAE nuts and washers.


Q: Do I need washers under the head?
A: Typically no—the round head provides a semi-flush finish, though washers can be used under the nut if desired.


Q: What size are these bolts?
A: Each bolt is 3/8 inch diameter and 2-1/2 inches long.


Streamlined Strength for Timeless Woodwork

These zinc-plated carriage bolts deliver a crisp, industrial sophistication that elevates crafted wood joinery. The smooth domed head offers a refined, minimal profile while the square neck anchors with confidence. Pair them with oiled hardwoods and matte black hardware for a chic contrast that feels both modern and enduring. A small detail with big impact—essential hardware for polished, luxurious builds.


Secure your projects with dependable, rust-resistant performance—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: 35316531754

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Katie
Lowell, US
★★★★★ 5
Great toddler backpack!
Size: Small, Color: All Black
My daughter is in prek 3 and loves this backpack. Nice and small for her to carry. A full folder will fit with a little force, but if you’re looking for something to actually carry folders and books, maybe not the best.
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Reviewed in the United States on February 28, 2026
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Mick
Pawtucket, US
★★★★★ 5
“Tiny Backpack, Big Personality!”
This little backpack is doing big kid things — and my toddler knows it. The second we strapped it on, he marched around like he was off to close a business deal with juice boxes in both hands. It’s the perfect size for tiny shoulders, and the chest buckle? GENIUS. No more slippy straps or bag-flinging tantrums. It stays put like a champ, even during epic playground sprints and spontaneous dance moves in the grocery store. The material is sturdy, the zippers glide like butter, and the reflective strip makes my toddler look like he’s ready for a baby night shift. The color combo is sleek — black and grey with just the right touch of “cool kid on campus” energy. Plenty of space for snacks, sippy cups, a favorite toy, and 14 mysterious pebbles he insisted on collecting “for science.” If your 2-4-year-old wants to carry their own stuff and look proud doing it — this is the backpack for them. Highly recommend (and yes, I already ordered another one for backup... because toddlers). 🎒
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Reviewed in the United States on June 26, 2025
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priscilla
Dallas, US
★★★★★ 5
Good! Recommend
Size: Small, Color: Pink Dino
My 2 year old loves this backpack. I love the snap in the front for additional support of the distribution of weight. It has a good size cup holders and the inside of the bag is very spacious.
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Reviewed in the United States on December 11, 2025
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vkb
San Leandro, US
★★★★★ 5
A good buy especially for young kids
Our community is providing school supplies this year for an elementary school that we adopted. Backpacks are in big demand but, as you know if you’ve been shopping, pretty pricey. This backpack was a Prime-day find so I bought a couple of them but, even back to the regular price, it’s a good deal especially for very young kids. In person the backpack is cute and stylish with the vibrant range of colors you see in the product pictures. I bought the large backpack which, as you can see in the photo, is more than tall enough for a standard manila folder. The stitching seems sound and the straps work as you would expect; it also has two side pockets. If I had to pick a weak spot, I’d say it’s the zipper, especially the one on the front pouch. It’s not a problem at the moment but it’s nylon, not metal, and so I don’t expect it to last forever. But if it gets through one school year, I consider that good. I think it’s a pretty good buy if you’re on a budget.
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Reviewed in the United States on July 14, 2025
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Solomon’s Mom
Waukegan, US
★★★★★ 4
Backpack Backpack
Size: Small, Color: Pink Dino
Cute, definitely a perfect size for my tall 3 yr old. (3’7”) I did have to let it air out though. Has a weird smell.
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Reviewed in the United States on March 31, 2026

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