Hillman 5/16 in. x 3-1/2 in. Stainless Steel Carriage Bolts (25-Pack)
SKU: 42396517231

Hillman 5/16 in. x 3-1/2 in. Stainless Steel Carriage Bolts (25-Pack)

Sale price$41.39 Regular price$45.99
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Description

Hillman 5/16 in. x 3-1/2 in. Stainless Steel Carriage Bolts (25-Pack)Stainless Steel Carriage Bolts, 5 16 in. x 3 1 2 in. (25 Pack) Durable Hillman stainless steel carriage bolts provide a smooth, domed head and square neck that locks into wood for secure fastening. Ideal for exterior projects, they resist rust and corrosion and deliver a clean, semi flush finish. Key Features: Corrosion Resistant: Stainless steel construction stands up to outdoor and marine environments Secure Hold: Square shoulder locks into wood to

Stainless Steel Carriage Bolts, 5/16 in. x 3-1/2 in. (25-Pack)

Durable Hillman stainless steel carriage bolts provide a smooth, domed head and square neck that locks into wood for secure fastening. Ideal for exterior projects, they resist rust and corrosion and deliver a clean, semi-flush finish.


Key Features:

  • Corrosion Resistant: Stainless steel construction stands up to outdoor and marine environments
  • Secure Hold: Square shoulder locks into wood to prevent spinning during tightening
  • Clean Finish: Smooth, domed head creates a semi-flush, snag-free surface
  • Coarse Thread: SAE coarse threading for strong, reliable assembly
  • Value Pack: Includes 25 bolts sized 5/16 in. diameter x 3-1/2 in. length

Specifications Table:

Specification Details
Diameter 5/16 inch
Length 3-1/2 inch
Material Stainless Steel
Finish Stainless steel
Thread Size 5/16-18 (coarse)
Thread Type Coarse
Unit of Measurement SAE
Head Style Domed carriage head
Neck Style Square shoulder
Number in Package 25
Packaging Type Boxed
Intended Use Fasten wood face to wood or metal frame
Pack UPC (on box) 008236144932

Frequently Asked Questions (FAQ):

Q: Do these bolts include nuts or washers?
A: No—this pack contains only the carriage bolts; nuts and washers are sold separately.


Q: Can I use these outdoors?
A: Yes, the stainless steel material offers excellent rust and corrosion resistance for exterior applications.


Q: What tools are needed for installation?
A: Tighten from the nut side; the square neck locks into the wood to prevent bolt rotation, so no driver is needed for the head.


Q: What thread size are these?
A: They are 5/16 in. diameter with coarse SAE threads (5/16-18).


Q: What materials are they best for?
A: Designed to fasten a wood face to wood or metal framing.


Sleek Strength for Thoughtful Builds

A polished dome of stainless steel lends a refined, unobtrusive accent to woodwork while delivering steadfast performance. The square-shoulder detail is the quiet hero—discreetly locking into timber for a flawless, flush look. Pair with cedar or painted millwork where hardware should disappear into the narrative. For elevated outdoor living, these bolts are the subtle signature of craftsmanship.


Upgrade your project with corrosion-proof, clean-finish carriage bolts—add this 25-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: 42396517231

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Amazon Customer
Charlottesville, US
★★★★★ 4
A pain to put on the wall
4 stars only because to actually screw it into the wall you need either an angled screw driver, which we had to go buy, or a really really short screwdriver as the one that came with it is just a tad to long. Also the mollies that come with it our cheap and would not hold up on regular dry wall, which we found out, thank goodness, before we finished hanging it. As we were hanging it the top pulled right out of the wall. We had heavy duty ones at home already and used those. The shelf was a breeze to actually put together and once we got past the trouble of hanging it, is wonderful and looks great. So, 1. buy a better screwdriver, and 2. get heavy duty mollies.
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Reviewed in the United States on September 14, 2024
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Monica R.
Fort Morgan, US
★★★★★ 5
Pretty and practical
Color: Rustic Brown, Size: 31.5 Inch
I love the rustic wood and iron look. It’s sturdy, spacious, and exactly what I needed in my basement apartment. I ended up buying another one to make it one long shelving unit. I highly recommend them!
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Reviewed in the United States on August 11, 2025
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Miyari
Carnegie, US
★★★★★ 5
Very handsome and functional shelf with a ton of space!
I was looking for a black wall shelf to go above our coffee bar that included a bar with hanging hooks for empty glasses and a bar towel. This shelf met those needs, and I'm very impressed with it overall. It's a bit pricey for how simplistic it is, but it doesn’t feel or look cheap. Assembly and installation with the provided hardware was easy with help of a drill. The shelves are deep and work well for storage baskets and larger items. It’s a sharp-looking piece that really improved the look of our expanded coffee bar.
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Reviewed in the United States on June 7, 2025
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Andrea D.
Louisville, US
★★★★★ 5
Wonderful shelf but difficult to install!
Size: 41 Inch Extra Long, Color: Rustic Brown, Size: 41 Inch Extra Long, Color: Rustic Brown
I absolutely love this shelf. It's perfect over our coffee bar and is extremely sturdy. Assembling it was very easy, but hanging it was challenging. The design could definitely use a little improvement. My husband had to order an angles drill adapter to be able to get the screws in. He also bought different anchors than what came with it. But now that it's up it looks fantastic!
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Reviewed in the United States on January 18, 2026
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Juan Salgado
Dallas, US
★★★★★ 5
Great gift
Size: 41 Inch Extra Long, Color: Rustic Brown
This pipe shelving set delivers outstanding quality all pieces arrive nothing missing or damaged—the metal piping is sturdy and the wood shelves feel solid and well-crafted, not flimsy or cheap. The look is a perfect blend of rustic charm and industrial edge, making it an eye-catching addition to any farmhouse-style kitchen, bathroom, or living room. In terms of durability, it holds weight well without sagging, and installation is straightforward with secure brackets that stay put. Bonus: It’s not just decorative—it’s functional. Whether you're displaying plants, books, or jars, it adds both style and smart storage to your space. of course there are better higher quality one out there but these excellent value for you money.
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Reviewed in the United States on June 30, 2025

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