SKU: 99106509314

Hillman 5/16 in. x 5 in. Hot Dipped Galvanized Steel Carriage Bolt, 50-Pack

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Description

Hillman 5/16 in. x 5 in. Hot Dipped Galvanized Steel Carriage Bolt, 50-PackHillman 5 16 in. x 5 in. Galvanized Carriage Bolts (50 Pack) Durable steel carriage bolts with a hot dipped galvanized finish to resist rust in outdoor and heavy duty applications. The round head and square neck provide a clean, semi flush look and self locking grip in wood to wood or wood to metal projects. Ideal for decks, fencing, and structural framing. Key Features: Rust Resistant Finish: Hot dipped galvanization for superior corrosion protection

Hillman 5/16 in. x 5 in. Galvanized Carriage Bolts (50-Pack)

Durable steel carriage bolts with a hot-dipped galvanized finish to resist rust in outdoor and heavy-duty applications. The round head and square neck provide a clean, semi-flush look and self-locking grip in wood-to-wood or wood-to-metal projects. Ideal for decks, fencing, and structural framing.


Key Features:

  • Rust-Resistant Finish: Hot-dipped galvanization for superior corrosion protection in outdoor environments
  • Secure Hold: Square neck under the round head locks into wood to prevent spinning during installation
  • Clean Appearance: Low-profile round head delivers a neat, semi-flush finish without a washer
  • Heavy-Duty Construction: Grade 2 steel and coarse threads for reliable fastening strength
  • Bulk Value Pack: 50 bolts per boxed package for larger projects

Specifications Table:

Specification Details
Finish Hot Dipped Galvanized
Material Steel
Length 5 inch
Diameter 5/16 inch
Thread Type Coarse
Grade 2
Unit of Measurement SAE
Number in Package 50 pack
Packaging Type Boxed
Category Carriage Bolts

Frequently Asked Questions (FAQ):

Q: What size drill bit should I use for these 5/16 in. carriage bolts?
A: Use a 5/16 in. hole for the shank; in wood, slightly undersize may improve neck bite. For metal, match 5/16 in. and deburr.


Q: Are these suitable for outdoor use?
A: Yes. The hot-dipped galvanized finish provides excellent rust protection for exterior projects like decks and fences.


Q: Do I need a washer with the round head?
A: Typically no; the broad round head provides a semi-flush finish. Use a nut and optional washer under the nut if desired.


Q: What nut and thread type pairs with these bolts?
A: These use coarse SAE threads; pair with matching 5/16 in. coarse-thread nuts.


Q: Can they be used in treated lumber?
A: Hot-dipped galvanized fasteners are appropriate for most pressure-treated lumber; always follow local code and lumber manufacturer guidance.


A clean, industrial accent with enduring strength

The rounded head of this carriage bolt lends a refined, minimal silhouette that whispers utility-chic. Its galvanized sheen brings a subtle, matte texture—perfect for modern rustic detailing on decks, gates, and furniture. Use it as a deliberate design element, lining up heads in symmetrical rows to create quiet rhythm across wood surfaces. It’s a hardworking staple that elevates function into effortless, everyday luxury.


Upgrade your project with rust-proof, clean-finished fastening—add this 50-pack of Hillman galvanized carriage bolts to your cart now.

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: 99106509314

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4.6 ★★★★★
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Verified Purchase
Charles H.
Battle Creek, US
★★★★★ 5
Good quality sound deadener at a good price.
Model: NewSLS50_52
Quality sound deadening that adheres to body panels well. You can easily hear the vibration reduction after just the first piece by tapping on the body panel before and after.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 21, 2025
N
Verified Purchase
Nick Frazier
West Palm Beach, US
★★★★★ 4
Good stuff at a good price
Model: NewSLS50_52
Works well and sticks well. I used a roller and it has been over a year and everything still sticking as good as day i put it everywhere. I didnt use any adhesive but I did wipe everything down with acetone before I applied. Good stuff at a good price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 23, 2025
D
Verified Purchase
Darren Gray
Omaha, US
★★★★★ 5
Good value
Model: NewSLS50_52, Model: NewSLS50_52
Working perfectly. Install of stereo equipment and carpet left me wanting some heat and sound resistant materials.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026
T
Verified Purchase
Tharin
Dallas, US
★★★★★ 5
BUY THIS ONE!
Model: NewSLS50_52
This is one of the good ones. There are other brands just as good, and manny brands are worse, but this handles well, rolls down easily, doesn't come off at all easily, and adapts to dips and curves like a champ. Appropriately heavy and dead, I'm happy with the way it smothers panel resonances and even at muffling direct sound, like a big hand over my Uncle Harry's eternally noisy mouth. You can rip the foil but you have to work hard at doing that. Remember to buy a brayer; you can roll overlaps nice and thin. Also remember to pre-wipe the sheet metal with a decent solvent like acetone or Stoddard/Varsol. It should last forever.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2025
H
Verified Purchase
Harvey
Cuba, US
★★★★★ 5
Good stuff, but watch the temp
Model: NewSLS50_52
I used this in my single cab pickup truck (89 ford.) It only took half the box (10 sheets or 25 square feet) to do the floors, but I bought the big box because I plan to do the doors, back wall, and maybe the roof as well. One thing I learned is that the temperature matters when you’re doing the installation. It was around 55F when I started in the evening, and when it dipped down into the 40s the sheets would not stick to the metal, and were hard to compress with the roller. That’s why I ended up only doing the floors and not any vertical surfaces; i will have to wait for a nice hot day. The other thing is that the foil layer on top is razor sharp at the edges, definitely wear gloves! I didn’t notice until after but I have little papercuts all over my fingers. Aside from those things, the install was easy and straightforward. The sheets cut easily with scissors, and any goo that ends up on your hands or scissors can be cleaned up with acetone (nail polish remover), or lacquer thinner. I would use this stuff again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 16, 2023

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