Hillman 5/16 in. x 4 in. Zinc-Plated Steel Carriage Bolt, 50-Pack
SKU: 21112465776

Hillman 5/16 in. x 4 in. Zinc-Plated Steel Carriage Bolt, 50-Pack

Sale price$24.29 Regular price$26.99
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Description

Hillman 5/16 in. x 4 in. Zinc-Plated Steel Carriage Bolt, 50-PackHillman 5 16 in. x 4 in. Zinc Carriage Bolts (50 Pack) Durable zinc plated steel carriage bolts for fastening wood to wood or metal. The smooth, domed head provides a clean, low profile finish while the square neck locks into material for easy one wrench installation. Key Features: Zinc Plated Protection: Resists rust and corrosion for indoor and light outdoor use Low Profile Domed Head: Clean, semi flush appearance ideal where clearance is tight

Hillman 5/16 in. x 4 in. Zinc Carriage Bolts (50-Pack)

Durable zinc-plated steel carriage bolts for fastening wood to wood or metal. The smooth, domed head provides a clean, low-profile finish while the square neck locks into material for easy one-wrench installation.


Key Features:

  • Zinc-Plated Protection: Resists rust and corrosion for indoor and light outdoor use
  • Low-Profile Domed Head: Clean, semi-flush appearance ideal where clearance is tight
  • Square Neck Locking: Grips into wood to prevent spinning—no washer needed under head
  • Versatile Fastening: Commonly used to attach a wood face to wood or metal frames
  • Pre-Drill Guidance: Drill pilot holes matching 5/16 in. diameter for best results

Specifications Table:

Specification Details
Brand Hillman
Product Type Carriage bolt
Material Steel
Finish Zinc-plated
Diameter 5/16 in.
Thread Size 5/16-18
Length 4 in.
Head Style Domed, low-profile
Neck Type Square neck
Pack Quantity 50 pieces
Intended Use Fasten a wood face to wood or metal
Installation Pre-drill hole to match bolt diameter

Frequently Asked Questions (FAQ):

Q: What materials can these carriage bolts fasten?
A: They’re designed to fasten a wood face to either wood or metal.


Q: Do I need a washer under the head?
A: No. The square neck locks into the material, eliminating the need for a flat washer under the head.


Q: Is pre-drilling required?
A: Yes, pre-drill a hole matching the 5/16 in. diameter for proper fit and to prevent splitting.


Q: Are these suitable for outdoor use?
A: The zinc plating offers moderate corrosion resistance; for harsh or long-term outdoor exposure, consider hot-dipped galvanized or stainless options.


Q: What is included in the package?
A: 50 pieces of 5/16 in.-18 x 4 in. zinc-plated steel carriage bolts.


Streamlined Hardware with a Polished, Practical Edge

A brushed zinc sheen brings a subtle sophistication to utilitarian joinery, letting functional details read as thoughtfully edited accents. The domed head sits like a small metallic button, smoothing transitions on furniture bases and garden builds. Style it exposed on a bench or planter where the quiet glint complements natural wood grain. Consider it a finishing touch that makes everyday construction feel impeccably tailored.


Upgrade your next build with durable, clean-finished fastening—add this 50-pack of Hillman zinc 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: 21112465776

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Nicola Godfrey
Bozeman, US
★★★★★ 5
Great product, it's the only one I use now.
Color: Black_4, Size: Medium
Love these, Lowes used to carry but no more. So happy to find them on Amazon ! I actually use them to hang bridles and halters for my horse, they are perfect at a good price.
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Reviewed in the United States on April 26, 2026
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ekimrednif
Houston, US
★★★★★ 5
Strong and useful
Color: Orange_J, Size: Large
very strong and very useful for me.
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Reviewed in the United States on March 6, 2026
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Alessandra Barbanti
Houston, US
★★★★★ 5
Excelente producto
Color: Black_2, Size: Medium
Excelente articulo, no puedo esperar a usarlo. Llego en muy buen estado y rapido. Lo recomiendo
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Reviewed in the United States on February 3, 2026
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Frank L.
Lake Worth, US
★★★★★ 5
These really work!
Color: Orange_L Hooks, Size: X-Large
I’ve purchased and used these hooks to hang beach chairs on two different occasions. They are very sturdy and their protective covering prevents damaging the chairs.
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Reviewed in the United States on April 19, 2025
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Verified Purchase
CinemaPete
Chelsea, US
★★★★★ 5
Excellent Tool For Drilling Shelf Pin Holes
I had a project where I was extending the depth of the bottom half of a bookcase I had made out of pre-drilled MDF from Home Depot. The original bookcase was 11" deep x 10' high. The extended depth of the bottom is to be used to hold audio gear and needed to be 18" depth, front to rear. I was able to increase the depth but had to insert additional panels on the left and right so that shelf pins could be installed. I needed a shelf pin jig to do that, and this jig was perfect for the job. After completing my holes and mounting some shelves I was pleased that the alignment with the inner portion of the shelf was perfect and the distance between holes lined up exactly as with the original panels from Home Depot. The jig is high quality fabricated aluminum, not plastic, and it comes with two drill bits, and stop and Allen wrench, including an instruction manual, all in an attractive plastic case. The jig is well worth the modest price and I would definitely recommend it for drilling shelf clip holes.
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Reviewed in the United States on October 27, 2024

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