SKU: 28520240179

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

Sale price$28.83 Regular price$32.03
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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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MBechtold
Massapequa, US
★★★★★ 5
Holds a lot, doesn't soak my countertop
Color: Grey, Color: Grey
Where has this wonderful organizer been all my life? I've always struggled with keeping those little suction-cup organizers reliably attached to the walls of stainless steel sinks -- after a while the cups always fail. But this organizer is just large enough and has room for every scrubbing item I want to grab in a hurry. And there's never water pooling under the organizer and soaking the granite countertop because there are little foam feet on the underside. It even looks classy. I just love it! Only time will tell if this organizer is durable. So far I haven't had to clean it.
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Reviewed in the United States on January 14, 2026
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Verified Purchase
Jennybgood777
San Leandro, US
★★★★★ 4
Almost perfect sink caddy
Color: Black, Color: Black
My old reliable sink caddy had rusted through and I ordered 3 different replacements that I ended up returning. You would think a sink caddy would be very straightforward and simple - however I had certain things I needed out of it. What I like- -the large size. I don’t love having a million soaps but my husband recently got diagnosed with psoriasis on his hands. We tried Castile soap and water in a pump, and several free and clear types. He’s always working in the yard or cooking and we need them ALL out and accessible. Plus needed room for our actual dish washing soaps and brushes. Even if you have a normal amount of soaps - you could easily display a spray or other cleaner to fill this caddy up. -the tray. This one was important. I returned several others bc their plastic tray or absorbing stone bottoms were too small. The caddy would overhang and your soaps would trip out over past them. This stone tray has a little lip that goes all the way around like a border for your caddy. Most of the drips of water stay confined to the tray. (Unless you have splashy kids washing hands & dripping everywhere). But it’s mostly contained. -absorbing tray. This tray does not require you to empty the water out each day so it doesn’t over fill. It absorbs the water. I don’t know how. Maybe magic. But it doesn’t over fill and it doesn’t leak on the counter. If you have dirty splashes or a dirty scrub brush dripping down - it can leave some brownish marks. I take my soap out once a week and wash the caddy down and scrub the tray and it’s good as new. They included a small sand paper to use if the tray ever loses its absorbing power- you can lightly sand the stone and it’s supposed to open up the pores and be more absorbent again. I’ve only had mine a month and it’s not been an issue yet. The tall, removable brush caddy - while I do wish it was a teensy bit taller - it’s still taller than any others I tried. Your brush will have to lean a bit unless you have multiple brushes helping to hold it up. We basically use one brush and a straw cleaner and I have doubles of each. I keep 1 set out and 1 set in my dishwasher and I switch them every day. But there is room so if you need bottle brushes or scrubbers you could fill it up. You can also remove that little basket entirely if you want. And it has a hook on the back of it so if you prefer - you can hang it off the front of the caddy instead and have it overhanging over your sink instead. My sink is very rounded and it’s tough to display a caddy so that the soap is all accessible but it’s also not overhanging too much. The weight of the under stone tray doesn’t allow it to tip over into the sink or move. They also included sticky protective pads for the bottom of your stone which protects your counter tops and also makes it non slip. Over all I love and am very happy. I hope it doesn’t rust over time. But I would purchase it again. And if they made attachments for it or taller brush basket add ons I would purchase those too. Thanks for reading my ridiculously long review for a simple sink caddy. But if you’re very particular about things like me, I hope it helps!
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Reviewed in the United States on April 17, 2026
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Lola
Omaha, US
★★★★★ 5
No clutter!
Color: Black
I bought this because we had a clutter of soaps, sponges around the sink... My husband was happy I made this purchase! One place for all the items!
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Reviewed in the United States on April 6, 2026
K
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Kathi
Dallas, US
★★★★★ 5
Works well.
Color: Black
As described, but I think I should have gone with the larger one. Works well and does the job. No runny soapy water on the kitchen counter.
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Reviewed in the United States on April 18, 2026
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Davis
San Leandro, US
★★★★★ 5
Quick drying
Color: White
Love this! It keeps things organized, dry, and functional
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Reviewed in the United States on March 31, 2026

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