SKU: 28520240179

Hillman 3/8 in. x 3 in. Zinc-Plated Steel Carriage Bolts, 50-Pack

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Ships within 48 hours · Estimated delivery Sep 13 - Sep 18

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Description

Hillman 3/8 in. x 3 in. Zinc-Plated Steel Carriage Bolts, 50-Pack3 8 in. x 3 in. Zinc Plated Carriage Bolts (50 Pack) Durable Hillman carriage bolts made from zinc plated steel for rust resistant fastening in wood to wood or wood to metal applications. The rounded head creates a smooth, semi flush finish while the square neck locks into wood to prevent spinning. Key Features: Rust Resistant Zinc Plating: Helps protect against corrosion for long lasting performance Self Locking Square Neck: Prevents bolt rotation in

3/8 in. x 3 in. Zinc-Plated Carriage Bolts (50-Pack)

Durable Hillman carriage bolts made from zinc-plated steel for rust-resistant fastening in wood-to-wood or wood-to-metal applications. The rounded head creates a smooth, semi-flush finish while the square neck locks into wood to prevent spinning.


Key Features:

  • Rust-Resistant Zinc Plating: Helps protect against corrosion for long-lasting performance
  • Self-Locking Square Neck: Prevents bolt rotation in wood for easier installation
  • Smooth, Low-Profile Head: Creates a semi-flush finish without a separate washer
  • Coarse Thread, SAE Grade 2: Reliable grip for general-purpose fastening
  • Bulk 50-Pack: Convenient boxed packaging for projects and job sites

Specifications Table:

Specification Details
Diameter 3/8 in
Length 3 in
Material Steel
Finish Zinc-Plated
Grade 2
Thread Type Coarse
Unit of Measurement SAE
Packaging Type Boxed
Number in Package 50
Each Weight 5.300 lb
Product Type Carriage Bolt
Alternative UPC 037504830963

Frequently Asked Questions (FAQ):

Q: What materials are these bolts best suited for?
A: Designed to fasten a wooden face to wood or metal frames; the square neck bites into wood to prevent spinning.


Q: Can these be used outdoors?
A: Zinc plating offers rust resistance but may not be ideal for all exterior projects; consider hot-dip galvanized for harsh outdoor environments.


Q: Do I need a washer under the head?
A: Typically no—the rounded carriage head provides a semi-flush finish that often eliminates the need for a washer.


Q: What thread type do they have?
A: Coarse thread per SAE standards, suitable for general-purpose fastening.


Q: What size and length are included?
A: Each bolt is 3/8 inch diameter by 3 inches long; this package contains 50 bolts.


A Clean, Crafted Finish for Timber Details

These zinc-plated carriage bolts bring a tailored, streamlined note to carpentry—perfect for benches, gates, and statement woodwork. The domed head offers a refined, flush look while the square neck anchors with confidence. Pair them with oiled oak or painted pine to let hardware quietly elevate the piece. A small detail with big impact, they’re the finishing touch of effortless, polished living.


Secure your project with reliable, rust-resistant 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: 28520240179

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Teri PD
Houston, US
★★★★★ 5
FANTASTIC FIT
Size: 16 Plus, Color: Washed Blue
I'm a 4'7" , 65 year old woman. Due to abdominal issues I needed jeans that give that extra something on the waist. I've tried on just about every brand of jeans ranging in size from adult/junior 6 to 12. If they fit on the legs the waist was huge. If they fit on the waist the legs and butt had enough room for me and a friend. I was resigned to wearing yoga pants and leggings with big shirts. My son mentioned that he loved the Amazon basics men's dress slacks, so I figured why not. First I looked at women's and juniors, and I knew from the measurements that I was still stuck. Then I remembered that about 15 years ago I'd buy girls pants (I was a size 12 in kids at the time) Looking at the sizes I knew a 12 was way too small, then I saw the 16 plus. With hesitation I bought them. Well glory be miss Agnes, THEY FIT. Comfortable, real jeans again. Sure, I have to take them up about 6 inches, but that's fine, not a problem. I'm just so happy to have real jeans again !!!
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Reviewed in the United States on November 30, 2023
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DeRobinson
Cuba, US
★★★★★ 5
Who doesn't love a unicorn?
Size: 2T, Color: Pink/Unicorn
Cute set but runs a bit big in my opinion for a size 2T. My grandbaby is tall for her age (22 months), but the pants were really long and loose on her, granted she's not chunky, so factor that in. Overall, it's a nice set and the material is soft (especially the pants) and seems like it would keep the little ones warm.
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Reviewed in the United States on December 31, 2025
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Jennuh G.
Whiting, US
★★★★★ 5
Cute outfit for everyday.
Size: 2T, Color: Pink/Unicorn
Exactly as pictured. Good quality, not too thin but also not too thick. True to size and looks like it will keep my baby warm when she’s inside. Good price on sale! Was a steal!
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Reviewed in the United States on December 13, 2025
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K.B
Houston, US
★★★★★ 5
High Quality
Size: X-Small, Color: Pink/Unicorn
High print quality, and vivid colors. Got exactly what I expected.
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Reviewed in the United States on December 25, 2025
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Tsia
Louisville, US
★★★★★ 4
Just as pictured
Size: X-Large, Color: Mauve/Apples
It is sized big so I suggest that you order a size down.other than that it is just as pictured.
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Reviewed in the United States on November 13, 2025

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