Best Round Carriage Bolts in 2026
Daisy
Last Updated: Jul 19, 2026
Daisy
Last Updated: Jul 19, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| VIGRUE-KING OF SCREW | 9.88 | ✅ | ✅ | ✅ |
Head Style: Flanged Hex; Pitch: M8-1.25mm; Finish: Stainless Steel; Socket wrench: 13mm; Full UNC Thread; Metric flanged hex bolts - DIN6921
Sizes: M8 x 16/20/25/30mm Flanged Hex Head Bolts pair with serrated flange lock nuts and washers.
Flange Design: there have a flange on the bottom of the bolts head and the flange nuts, which distributes the load like a spring washer; And serred flange make it screw firmly
Easy to Get the Exact Sizes: The bolts and nuts come in a portable firm clear box with corresponding sizes label. It is convenient for you to put away and store, which allow you to get the one you need quickly, improving your project efficiently.
High Quality: these bolts set are made of good A2-70 stainless steel 18-8 (304) material, featuring with higher hardness & great tensile strength, offering corrosion resistance even in severe surroundings.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Bolt Dropper | 9.93 | ✅ | ✅ | ✅ |
【High Quality Stainless Steel】Bolt Dropper Carriage Bolts are 100% 18-8 (304) Stainless Steel giving them one of the highest forms of corrosion resistance. This makes them the perfect choice for use in any environment (including marine/saltwater).
【Bolts You Can Depend On】Our carriage head bolts are very strong and are great for both indoor and outdoor use. Whether you are attaching a piling to a saltwater dock or securing a swing set, you can depend on Bolt Dropper carriage bolts to hold and last.
【Great To Keep Around】Bolt Dropper carriage bolts are great to have around for when you need them most! Use in any application, any condition and any environment! Bolt Dropper bolts are the highest quality available on the market and we stand by our claim 100%. They are strong, corrosion resistant and long lasting!
【Dimensions】Diameter: 3/8"-16 | Length: 2-1/2" | Thread Type: Coarse (standard) | Quantity: 10 pcs | Material: 18-8 (304)Stainless Steel.
【Lifetime Guarantee】We are so confident that our product is the best on the market that we offer a No Hassle Lifetime Guarantee.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Eastlo | 9.92 | ✅ | ✅ | ✅ |
Contents: 25 PCS 1/4-20 x 1-1/2 inch carriage bolt with round domed head and suqare neck
Screw Length: 1-1/2 inch or 38mm (measured from under the round head, including the neck height)
Big round domed head designed to eliminate the need for a washer; Square neck underneath the head helps self locking
Diameter of the head: 14.3-15mm; Height of the round head: 3.18-3.68mm; Height of the Neck:3.18-3.96mm
Made of 304 stainless steel 18-8 (no coating outside) which is superior to regular steel and any zinc plated fasteners, provides good strength and corrosion resistance in bad environments
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| MewuDecor Online | 9.86 | ✅ | ✅ | ✅ |
The carriage bolts are 100% stainless steel 18-8 (304) which offers a high level of chemical and corrosion resistance.
System of Measurement: Inch; Finish: Bright Finish.
Thread Diameter: 1/4 Inch; Thread Count: 20; Head Diameter: 0.594 Inch; Head Height: 0.145 Inch; Screw Length: 1-1/2 Inch.
Package Included: 25 x Carriage Bolts.
These bolts can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Discount Distributors LLC | 6.05 | ✅ | ✅ | ✅ |
Thread Diameter 0.250"
Head Diameter 0.594"
Head Height 0.145"
Square Neck Height 0.156" / Square Neck Width 0.26"
18-8 Stainless Steel provides strength and offers good corrosion resistance in many environments.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Aoesin | 9.95 | ✅ | ✅ | ✅ |
Standard: ASME/ANSI B18.5
Thread Size: 3/8 inch; Thread Pitch: 16 threads per inch (TPI)
Head Diameter: 0.782 inch to 0.844 inch; Head Height: 0.188 inch to 0.288 inch
Screw Length (include the square neck): 4 inch
Material: 304 Stainless Steel 18-8 that you will probably see in your pans and cookery tools. It's used for a wide variety of home and commercial applications. Because of its slightly higher strength and wear resistance than type 316, it's also used for nuts, bolts, screws and other fasteners.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| FASTENER DEPOT, LLC | 9.77 | ❌ | ❌ | ❌ |
Thread Diameter 0.3125"
Head Diameter 0.719"
Head Height 0.176"
Square Neck Height 0.187" / Square Neck Width 0.32"
18-8 Stainless Steel provides strength and offers good corrosion resistance in many environments.
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Fastenere | 2 |
| Aoesin | 1 |
| Bolt Dropper | 1 |
| Eastlo | 1 |
| Mewudecor | 1 |
| Vigrue | 1 |
We've carried out a comprehensive analysis of 1,009 reviews on carriage bolts, using our selection criteria to identify the best options in the fasteners. Our findings reveal that most customers typically select carriage bolts priced around $14.43, with top brands including and vigrue and hillman
Our team of expert editors reviewed these high-quality items and handpicked the top 7 carriage bolts for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the fasteners category. These include and vigrue-king of screw and amazon.com .
We are dedicated to assisting our users in finding the right bolts Products based on their needs, saving them considerable time when choosing which carriage bolts to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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