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Description
Hillman 5/16 in. x 2 in. Hot-Dipped Galvanized Steel Carriage Bolt, 100-Pack5 16 in. x 2 in. Galvanized Carriage Bolts (100 Pack) Heavy duty Hillman carriage bolts made of steel with a hot dipped galvanized finish for superior corrosion resistance. Ideal for fastening wood to wood or metal where a smooth, low profile dome head is desired. Key Features: Corrosion Protection: Hot dipped galvanized coating stands up to outdoor and marine environments Secure Hold: Square neck under head locks into wood to prevent spinning during
5/16 in. x 2 in. Galvanized Carriage Bolts (100-Pack)
Heavy-duty Hillman carriage bolts made of steel with a hot-dipped galvanized finish for superior corrosion resistance. Ideal for fastening wood to wood or metal where a smooth, low-profile dome head is desired.
Key Features:
- Corrosion Protection: Hot-dipped galvanized coating stands up to outdoor and marine environments
- Secure Hold: Square neck under head locks into wood to prevent spinning during tightening
- Clean Finish: Dome head provides a semi-flush, washerless appearance
- Durable Construction: Grade 2 steel with coarse threads for reliable strength
- Bulk Value: 100 bolts per retail package for large projects or jobsite stock
Specifications Table:
| Specification | Details |
|---|---|
| Diameter | 5/16 inch |
| Length | 2 inch |
| Material | Steel |
| Finish | Hot Dipped Galvanized |
| Grade | 2 |
| Thread Type | Coarse (UNC) |
| Unit of Measurement | SAE |
| Head Style | Carriage (dome head with square neck) |
| Number in Package | 100 pack |
| Packaging Type | Boxed |
| Intended Use | Fastening wood to wood or wood to metal |
| Package Dimensions (L x W x H) | 4.3 in x 4.3 in x 3.5 in |
| Package Weight | 5.4 lbs |
Frequently Asked Questions (FAQ):
Q: Are nuts and washers included?
A: No—this listing is for bolts only; pair with compatible 5/16 in. hot-dipped galvanized hardware.
Q: What thread type do these bolts have?
A: They use coarse (UNC) threads.
Q: Can these be used outdoors?
A: Yes. The hot-dipped galvanized finish offers strong rust resistance suitable for exterior use.
Q: What materials can I fasten with these?
A: Designed for fastening wood to wood or wood to metal where the square neck can bite into wood.
Q: Do I need a tool to hold the head while tightening?
A: No. The square underside locks into the wood to prevent turning; tighten from the nut side.
Rugged Hardware with a Clean, Classic Dome
I love the quiet confidence of a domed carriage head—sleek, purposeful, and timeless. The hot-dipped galvanization reads as a soft, matte silver that complements weathered woods and raw steel. Use these to anchor benches or garden gates; the rounded tops become subtle jewelry on rustic surfaces. Practical yet polished, they’re the finishing touch for elevated, outdoor craftwork.
Build with confidence—add this 100-pack of galvanized carriage bolts to your cart and tackle your next outdoor project right.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.6 ★★★★★
Based on 2207 reviews
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Product Reviews
★★★★★ 5
Perfect chair!
Size: 934-Z, Color: Blue, Size: 934-Z, Color: Blue
I have an adjustable-height desk (also purchased from Amazon) and needed a drafting chair for those times when my body gets tired of standing. This chair fits the bill and then some! I put it together myself; it took me about an hour, but would take me about half that next time, since now I know what to do (and what NOT to do!). All the parts were there; there are even spare parts (see photo). All the holes were drilled in exactly the right places, too, which isn't always the case when I buy things from Amazon (my standing desk is a great example). The chair fits me; I'm short (5'3.5"), and often the seats of furniture are too deep for me to rest my feet flat on the floor. The depth of the seat on this chair is just a little over 18 inches, and with the adjustable footrest ring, it's perfect. I don't think a tall or heavy person would fit in it, to be honest. But it's perfect for those of us who are vertically challenged. I love that it glides easily on my hardwood floors and that it turns 360 degrees. The chair comes in numerous luscious colors, so take your pick! It is very sturdy, has good lumbar support, and the seat and seat back are very comfortable. And the arms flip up, which was an absolute must when I was shopping for this chair. I got it on sale, too -- $109.00 -- and I'm delighted with this purchase.
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Reviewed in the United States on April 23, 2026
★★★★★ 5
Excellent adjustable drafting chair
Size: 934-Z, Color: Blue
Excellent chair design, extremely comfortable and exceptionally easy instructions to follow making for simple assembly. Love the amply wide cushioned seat and ergonomic backrest. The height adjustment feature works perfectly as well as positioning of the foot ring . Having the ability to raise the arms is also a big plus! I highly recommend this product for attractive appearance, comfort features, functionality and operation. Really nice chair!
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Reviewed in the United States on April 13, 2026
★★★★★ 4
Comfortable, stylish, and perfect for long work hours 💗✨
Size: 934-Z, Color: Pink
I bought this chair because I spend a lot of time working and needed something comfortable but also stylish, and I absolutely love it.
Since I started using it, I feel much better support in my back thanks to the lumbar support. It makes a big difference, especially during long work hours. The adjustable footrest is also a feature I didn’t know I needed, but now I use it all the time.
The flip-up armrests are very convenient because I can adjust them depending on what I’m doing or move them out of the way when needed.
The pink color is beautiful and adds a soft, elegant touch to my workspace. It looks great in a modern home office.
It feels sturdy, well-made, and very stable. Overall, it’s a great purchase that improved both my comfort and the look of my workspace.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
All-around thumbs up!
Size: 934W-Z, Color: Black
So far, so awesome. Easy to assemble, comfortable, arrived quickly and is exactly what I was looking for. I have a tall work bench in my new studio so I needed a chair that we could allow me to sit higher than a regular office chair and allow me to get off my feet after standing on the concrete floor. Plus its a nice looking chair that I am sure will last a long time. I love the flip-up arms and the lumbar support. This is just right!
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Perfect Balance of Comfort, Support, and Style!
Size: 934-Z, Color: Black, Size: 934-Z, Color: Black
I’ve been using this chair for a few weeks now, and I’m genuinely impressed with how much of a difference it’s made in my workspace. The mesh back is one of my favorite features—it offers excellent breathability and prevents that sticky, overheated feeling you sometimes get with solid-back chairs, even after sitting for hours. The seat cushion is firm enough to give proper support but still has enough give to keep me comfortable through long workdays. It feels like the perfect middle ground between soft and supportive.
The adjustable foot ring has been a complete game changer for me. I use a taller desk setup, and having somewhere to rest my feet makes a huge difference in posture and overall comfort. Whether I’m sitting upright for focused work or leaning back to read, it’s always at the right height.
The flip-up armrests are another smart design choice. When I’m typing, I like to have them down for support, but when I’m done, I can flip them up and push the chair neatly under my desk—saving space and keeping things tidy. The casters roll smoothly on both hardwood and rugs, so I can move around easily without scraping the floor or getting stuck. The overall build quality feels solid and sturdy, with no wobbles or creaks.
Assembly was surprisingly quick—everything was clearly labeled, the parts felt durable, and it only took me about 20 minutes from opening the box to sitting in the chair. The sleek, modern look is another big plus—it blends in perfectly with my home office décor without feeling bulky or taking up too much visual space.
If you’re looking for a chair that combines comfort, ergonomic support, durability, and style, I can’t recommend this one enough. It’s equally great for work, studying, or just relaxing at your desk, and it’s definitely been worth every penny.
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Reviewed in the United States on August 12, 2025
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