SKU: 65238048055

Hillman 3/8 in. x 4-1/2 in. Zinc-Plated Steel Carriage Bolt, 50-Pack

$26.99 $29.99
Save 10%
No.2 Bestseller on airconspareparts.com >

Pay in installments of $7.50 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 16 - Jul 21

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Hillman 3/8 in. x 4-1/2 in. Zinc-Plated Steel Carriage Bolt, 50-PackHillman Zinc Plated 3 8 in. x 4 1 2 in. Carriage Bolts (50 Pack) Durable zinc plated steel carriage bolts for fastening wood to wood or wood to metal projects. The round head with square neck locks into wood for a clean, semi flush finish and resists spinning during installation. Ideal for decks, fences, and general construction. Key Features: Reliable Wood to Metal Fastening: Square neck locks into wood to prevent spinning and provide secure

Hillman Zinc-Plated 3/8 in. x 4-1/2 in. Carriage Bolts (50-Pack)

Durable zinc-plated steel carriage bolts for fastening wood-to-wood or wood-to-metal projects. The round head with square neck locks into wood for a clean, semi-flush finish and resists spinning during installation. Ideal for decks, fences, and general construction.

Key Features:

  • Reliable Wood-to-Metal Fastening: Square neck locks into wood to prevent spinning and provide secure connections
  • Clean, Semi-Flush Finish: Rounded head eliminates the need for a washer in many applications
  • Corrosion-Resistant Zinc Plating: Provides moderate rust resistance and a consistent silver finish
  • Standard Threading: 3/8"-16 coarse right-hand threads fit common nuts and hardware
  • Bulk Value Pack: 50 bolts per pack for larger builds and repeat projects

Specifications Table:

Specification Details
Material Steel, zinc-plated (Alloy Steel listed by manufacturer)
Finish Zinc-plated
Color Silver/Zinc
Diameter 3/8 inch (0.38 in)
Length 4-1/2 inch
Thread Size 3/8"-16
Thread Type UNC (coarse)
Thread Style Right-hand
Head Type Round
Neck Square, self-locking
Manufacturer Grade Grade 2
Item Weight 6.45 lb (pack)
Number of Pieces 50
Usage Wood-to-wood or wood-to-metal fastening
Style 50-Pack
Part Number 240183
UPC 008236087031
Item Package Quantity 1 pack
Measurement System Inch

Frequently Asked Questions (FAQ):

Q: What materials can these carriage bolts be used with?
A: Designed for wood-to-wood and wood-to-metal fastening applications.

Q: Do I need a special tool to hold the bolt when tightening?
A: No— the square underside of the head locks into the wood to prevent spinning, allowing tightening from the nut side.

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

Q: What nuts should I use with these bolts?
A: Use 3/8"-16 coarse-thread nuts and compatible washers if needed.

Q: What is the length and diameter?
A: Each bolt is 3/8 inch diameter and 4-1/2 inches long.

A Polished, Workhorse Fastener for Timeless Wood Builds

These zinc-plated carriage bolts bring a refined, purposeful gleam to carpentry, anchoring boards with a tidy, rounded head that sits beautifully flush. The square neck detail is the hero—subtle yet decisive, keeping lines clean and hardware discreet. Style them across deck balusters or cabinetry jigs for a unified, tailored look. Essential hardware that quietly elevates craftsmanship and durability in every space.

AI Review Summary:

Across verified reviews, customers praise the consistent quality and value of the 50-pack, noting clean threads and reliable fit with 3/8"-16 nuts. Many highlight the square neck’s effective bite into wood, making installation straightforward and preventing bolt spin. The zinc finish is appreciated for its neat appearance and moderate corrosion resistance, though a minority recommend galvanized or stainless options for harsh outdoor conditions. Occasional feedback mentions minor variations in head stamping or finish, but performance remains solid. Representative quotes: “Perfect for deck and fence projects—threads were clean and every bolt usable.” “Square shoulder locks in great; no need to hold the head.” “Zinc is fine for most jobs, but I’d go galvanized near the ocean.”

Secure your next build with these dependable Hillman carriage bolts—add the 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: 65238048055

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.3 ★★★★★
Based on 22 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
K
Verified Purchase
K
Chelsea, US
★★★★★ 5
German Shepard
Size: Large, Style: Peanut Butter
They hold up under German Shepard
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026
B
Verified Purchase
Brennan Pike
Boise, US
★★★★★ 5
Amazing
Size: Large, Style: Peanut Butter
Awesome my pitbull loves her toys
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 4, 2026
M
Verified Purchase
26.2 Man
Dallas, US
★★★★★ 5
My Dogs' Absolute Favorite Chew: Tough, Flavorful, and a Lifesaver for Boredom!
What sets the Benebone Wishbone apart isn't just its durability—though that's impressive enough—it's the thoughtful design that caters to how dogs actually play and chew. Crafted from super-tough nylon infused with real bacon flavor (not some artificial nonsense that fades after one gnaw), this wishbone-shaped toy is ergonomically curved for easy gripping with paws or mouth, making it perfect for aggressive chewers who like to toss, carry, and battle it around. The three prongs give them multiple angles to attack, which keeps them engaged for hours without getting bored. For my Goldendoodles and Golden Retriever, who are all large-breed goofballs with endless energy, the large size (about 7.5 inches long) is spot-on—not too big to intimidate, but substantial enough to withstand their enthusiastic chomping. We've had ours for over two months now, and while it's showing some honorable battle scars (tiny grooves from their teeth, which actually make it easier for them to grip), it's nowhere near splintering or breaking. Compare that to the Nylabones we've tried, which either splintered too quickly or lacked any real appeal—these Benebones win hands down every time.Flavor is where this toy really shines, though. That real bacon infusion isn't just a gimmick; it's embedded throughout the nylon, so even as they chew deeper, the savory scent and taste keep coming. The more food-motivated Goldendoodle goes absolutely feral for it—drool flying as he parades it around the living room like a trophy, grumbling possessively if the others get too close. The female Goldendoodle prefers a more playful approach, flinging it across the room before pouncing back in for wrestling matches that leave her curls even more disheveled, while the Golden Retriever settles on the rug for long, focused sessions that help him unwind after fetch marathons. It's hilarious to watch them "fight" over it (in the gentlest, most sibling-rivalry way), but what's even better is how it redirects their energy. No more shredded couch cushions or nipped at ankles during zoomies—these bones have cut down on destructive behavior by at least 80%, giving me more time to relax and less time playing fetch with toy remnants.Safety and quality are top-notch too, which is crucial when you're dealing with heavy chewers. Made in the USA with non-toxic materials, it's free from BPA, phthalates, and all that sketchy stuff you worry about with imported plastics. The company even encourages responsible use: supervise play, especially for puppies or super-aggressive types, and replace when the ends wear down (though ours are still going strong). At this price point for a toy that lasts weeks instead of days, it's an absolute steal—I've already ordered backups in peanut butter flavor to rotate in and keep things fresh.If your dogs are anything like mine—energetic, mouthy, and in constant need of occupation—this Benebone Wishbone will be a game-changer. It's not just a chew toy; it's a boredom buster, a dental helper (those ridges get the tartar going), and a source of pure joy for your furry family members. My dogs love these bones more than their walks some days, and that's saying something! Five stars all the way—highly recommend grabbing one (or three) before your next Amazon order. Your sanity (and your furniture) will thank you.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 20, 2025
M
Verified Purchase
M. PHILLIPS
Los Angeles, US
★★★★★ 5
Truly Durable - No Joke, These Actually Last
I purchase these for the rescue I support, and they live up to their “durable” claim - no joke, these truly last. Durability: These are genuinely built for aggressive chewers. While the edges do eventually get rough with heavy use, the fact that they last a while with determined chewers is impressive. Most toys don’t make it that far. Design: The wishbone shape gives dogs multiple angles to chew from, which keeps them engaged longer. The ergonomic design works well for powerful chewers. Made in USA: Knowing these are made in the USA gives me confidence in their quality and safety, whether for rescue dogs or personal use. Flavor: The real bacon flavor keeps dogs interested and coming back to the toy repeatedly. Pros: ∙ Truly durable - actually lasts ∙ Made in USA ∙ Real bacon flavor dogs love ∙ Wishbone shape for multiple grip points ∙ Perfect for aggressive chewers ∙ Edges get rough eventually but toy holds up ∙ Rescue regularly uses these ∙ Better longevity than most chew toys Bottom Line: When a chew toy genuinely lasts with aggressive chewers, that’s noteworthy. Yes, the edges get rough with extensive use, but the toy itself holds together far longer than most. Excellent for rescues, shelters, or anyone with power-chewing dogs. Highly recommended!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 19, 2025
F
Verified Purchase
faith
Boise, US
★★★★★ 5
Great Bone for aggressive chewers but watch the wear & tear
I’m extremely happy I found Benebone Bacon Flavor Large Wishbone for my puppy who is an aggressive chewer. As the packaging reads this is a durable nylon. My puppy chewed the bone down to what you see in the picture within 3 days. It’s easy for him to handle. He loves the bacon flavor. He immediately took to it as soon as I gave it to him & off he went to work. I did check with my Veterinarian first to inquire if this was a safe bone & she assured me it was. She did advise to be aware of the wear & tear on the bone & toss when I felt it was time. I honestly wouldn’t of known when. I’m happy I took the time to read the inside of the packaging this bone came in. It referred me to the benebone website which showed pictures of bones-which I attached- that reflect the wear & tear & when it’s time to toss. There are the 3 categories of “Light Wear,” Moderate Wear“ & “Heavy Wear.” You’ll see the written description next to each. This I found very helpful, therefore I wanted to include it in my review, in hope of helping you. By the looks of my current bone it’s in between moderate & heavy wear. The large is costly, I feel, but it 100% occupies my puppy. It’s his favorite “toy.” I’ve only had small shavings come off since he’s chewed it. Nothing major to clean off the couch where he lays. Stuffed toys are a thing of the past now. I’ll continue to buy once it’s time to toss this bone because he loves it so much. I also love that Benebone is Made in the U.S.A.! I definitely recommend! A heads up! If you click on their store on the main page of this bone you’ll find other shapes of the nylon bone as this one. This Benebone won’t disappoint. Take the time to read the packaging. It’s informative & cool!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 7, 2023

recommand products

Various Artists: Kyoto: Ultimate Sound Souvenir / VAR - COMPACT DISCS
20.99
Jerry Donahue: Telecasting - COMPACT DISCS
18.98
Variations Fingering
22.00
Beegie Adair: My Jazz Piano By Request - COMPACT DISCS
22.99
Stone Wool Delaine Merino
12.50