Best Round Carriage Bolts of 2026

Name: 21 Pcs M6 Carriage Bolts, M6x60mm Coach Screws, Cup Square Carriage Bolts and Nuts and Washers, Carriage Screws, Round Head Coach Bolts Screws
Brand: mauuuba

Corey Phillips

Last Updated: 5 Feb 2026

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

Round carriage bolts are a type of fastener used to secure two objects together. These bolts have a domed head and a square neck that prevents them from turning as the nut is tightened. They are commonly used in applications where a smooth finish is desired, such as furniture assembly, outdoor construction, and automotive manufacturing. These bolts come in a range of sizes and materials, including stainless steel, brass, and zinc-plated steel, making them suitable for various environments and applications. Their ease of use and reliable performance make them a popular choice among builders, contractors, and DIY enthusiasts.

At a Glance: Our Top Picks

#TOP 1

21 Pcs M6 Carriage Bolts, M6x60mm Coach Screws, Cup Square Carriage Bolts and Nuts and Washers, Carriage Screws, Round Head Coach Bolts Screws

9.9

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21 Pcs M6 Carriage Bolts, M6x60mm Coach Screws, Cup Square Carriage Bolts and Nuts and Washers, Carriage Screws, Round Head Coach Bolts Screws

#TOP1

9.9

Read Review

#TOP 2

Merriway Carriage Bolts with Nuts Pack

9.8

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Merriway Carriage Bolts with Nuts Pack

#TOP2

9.8

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#TOP 3

50 Pcs M8 Coach Bolts

9.6

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50 Pcs M8 Coach Bolts

#TOP3

9.6

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Top 10 Round Carriage Bolts

#TOP 1

21 Pcs M6 Carriage Bolts, M6x60mm Coach Screws, Cup Square Carriage Bolts and Nuts and Washers, Carriage Screws, Round Head Coach Bolts Screws

mauuuba

BMAB-013

silver

6*60

21 Pcs M6 Carriage Bolts, M6x60mm Coach Screws, Cup Square Carriage Bolts and Nuts and Washers, Carriage Screws, Round Head Coach Bolts Screws, with Flange Nuts

9.9

FTB Score

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Features

Large Head Cup Square Carriage Bolts: The Round Head And Square Neck Prevent The Bolt From Turning When Tightening The Nut, Ideal For Wood-To-Wood Connections, Metal To Metal, Etc. The Smooth And Rounded Mushroom Head Design Prevents Opening From The Screw Head Side And Helps To Better Grip The Material.

Sturdy And Durable Material: Carriage Bolts Are Made Of High-Quality Carbon Steel, With A Galvanized Surface, Which Is Scratch-Resistant, Corrosion-Resistant, Not Easy To Rust, Not Easy To Break Or Deform, And Has Long-Lasting Durability And Stability.

Wide Range Of Applications: Our Coach Bolts Are Suitable For Use In Machinery, Wood, Scaffolding, Vehicle Manufacturing, Accessories, Latches, Doors, Fence Exteriors, And Other Fields. Suitable For Manufacturing, Glass Fittings, Metal Fittings, Wood Applications, And Metal Applications.

Package Includes: 21 Pieces M6x60mm Carriage Screws, 1 X Storage Box; The Storage Box Is Equipped To Help You Organize The Carriage Screws, Keep Them Organized, Easy To Access, Easy To Store, And Easy To Transfer.

Flange Nuts And Washers: Flange Nuts Can Make Your Installation More Precise, Tighten Better, And Carry Larger Loads; Washers Can Increase The Contact Area, Protect The Bolts, Extend Service Life, Provide Strong Retention, And Maximum Clamping Tight Force.

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#TOP 2 Best Merriway Carriage Bolt

Merriway Carriage Bolts with Nuts Pack

Merriway

BH04826

zinc plated

Pack of 10

Merriway BH04826 (10 Pcs) Carriage Bolts with Nuts, M6 x 100 mm (1/4 Inch x 4 Inch), Zinc Plated - Pack of 10 Pieces

9.8

FTB Score

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The Merriway Carriage Bolts are a pack of ten M6 x 100 mm bolts featuring a round head and square neck design. These bolts are ideal for providing a secure fastening solution for various projects, ensuring stability in your assemblies. The inclusion of nuts enhances convenience, allowing for straightforward installation. Additionally, following the provided instructions ensures proper assembly and maintenance, giving you peace of mind in your DIY tasks.

What We Like

Pack of ten bolts

Round head design

Square neck for stability

Includes nuts for convenience

Easy to follow instructions

#TOP 3

50 Pcs M8 Coach Bolts

SZSLMY

001-091

M8*50mm

50 Pcs M8 Coach Bolts, M8 x 50mm Cup Square Carriage Bolts and Nuts Set, Stainless Steel Coach Screws with Hexagon Flange Nuts

9.6

FTB Score

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Features

Precise Adaptation: M8 Carriage Bolts Are Matched With Flange Hexagonal Nuts, With Precise Threads And Good Adaptability. They Can Be Precisely Engaged During Installation And Are Suitable For A Variety Of Installation Scenarios, Such As Woodworking And Metal Processing.

High-Quality Materials: M8 Coach Bolts Are Made Of Stainless Steel, Which Has Excellent Corrosion Resistance And Is Suitable For A Variety Of Indoor And Outdoor Environments. Durable And Not Easy To Rust, Ensuring The Stability Of The Fastened Connection.

Multi-Scenario Application: Widely Used In Electronics, Machinery, Construction, Home Improvement And Other Fields. Whether It Is Furniture Assembly, Outdoor Facility Construction, Or Equipment Maintenance, It Can Be Reliably Competent

Easy Installation: The Square Neck Of The Bolt Can Be Inserted Into The Prefabricated Hole Without The Assistance Of Additional Washers. With Flange Nuts, The Tightening Operation Is Easy, Which Improves Assembly Efficiency And Is Suitable For DIY And Professional Construction

Anti-Loosening Design: Round Head Neck Bolts Are Matched With Flange Nut Patterns To Effectively Prevent Loosening Under Vibration And Other Working Conditions, Ensuring Long-Term Stability Of The Connection And Reducing Maintenance Requirements

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#TOP 4

Merriway BH04824 Carriage Bolts with Nuts

Merriway

BH04824

Silver

Pack Of 10

Merriway BH04824 Carriage Bolts with Nuts Cover

Merriway BH04824 (10 Pcs) Carriage Bolts with Nuts, M6 x 75 mm (1/4 Inch x 3 Inch), Zinc Plated - Pack of 10 Pieces

9.5

FTB Score

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Features

Round Head & Square Neck

Pack Of 10 X Carriage Bolt & Nut ZP M6 X 75mm

Nuts, Bolts & Accessories

Manufacturer: Merriway

If Instructions For Fixing, Assembly Or Maintenance Of The Products Are Included In The Packaging Then Please Ensure That They Are Followed

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#TOP 5

sourcing map 10Pcs Carriage Bolts, M10 x 50mm Stainless Steel 18-8 Round Head Square Neck Screws Black Oxide Bolt Screw

sourcing map

f24110600ux0794

Black

M10 x 50mm

sourcing map 10Pcs Carriage Bolts, M10 x 50mm Stainless Steel 18-8 (304) Round Head Square Neck Screws Black Oxide Bolt Screw for Fastening Accessories - Black

9.3

FTB Score

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Features

[Sturdy Material] - The Carriage Screws Are Made Of 304 Stainless Steel With Black Oxide Finish To Make Carriage Bolts High Strength And Resistant To Rust. Compared To Ordinary Screws, It Has Higher Corrosion Resistance, Wear Resistance And Rust Prevention, Stronger Strength, Less Prone To Damage, And Longer Service Life.

[Size & Package Content] - Thread Size: M10x50mm; Thread Pitch: 1.5mm; Head Size: 24mm X 5mm/0.94" X 0.2"(D*T); Square Neck Width: 10mm/0.39"; Package Content: 10pcs X Carriage Bolts Screws

[Wide Application] - Carriage Bolts Are Used To Fix Metal To Wood. Widely Used In Homes And Offices, Both Indoors And Outdoors, Such As Securing Headboards, Footboards, Doors, Bed Frames, Furniture, TV, Engineering, Or Other DIY Projects.

[Secure And Reliable] - The Round Head Design And Square Neck Of These Carriage Bolts Enable A Secure And Self-Locking Fit When Applied In Square Holes; The Combination Of The Bolt's Useful Shape Can Be Used With Hex Nuts And Flat Washers Ensures Reliable And Stable Fastening For Your Projects.

[Carriage Bolt Screws] - The Carriage Bolt Has Many Different Sizes For You To Choose From; These Various Sizes Can Satisfy A Wide Variety Of Needs, Ensuring Robust Structural Support Across A Host Of Applications.

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#TOP 6

SEIDER 10/20pcs M3 M4 Carriage Bolts 304 Stainless Steel GB12 Round Head Square Neck Screws Bolts Length 30mm

SEIDER

One Color

M4x30mm-10pcs

SEIDER 10/20pcs M3 M4 Carriage Bolts 304 Stainless Steel GB12 Round Head Square Neck Screws Bolts Length 30mm Cover

SEIDER 10/20pcs M3 M4 Carriage Bolts 304 Stainless Steel GB12 Round Head Square Neck Screws Bolts Length 30mm(M4x30mm-10pcs)

9.2

FTB Score

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Features

Product Name:Carriage Bolts Round Head Square Neck Screws Bolts

304 Stainless Steel Hexagon Hex Socket Cap Head Screw Bolt

Thread Diameter: M3 (3mm), M4 (4mm)

Packaging: Plastic Packaging

Material: 304 A2 Stainless Steel

Available Length: 30mm (The Length Of The Screw With The Square Neck Part,excluding The Length Of The Head)

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#TOP 7

ForgeFix Carriage Bolts | M10 x 200mm

Forgefix

CB10200M

Silver

M10 x 200mm

ForgeFix Carriage Bolts | M10 x 200mm | Zinc Plated | Bag 10

9.1

FTB Score

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Features

Ideally Suited For Timber To Timber Joining

A Round Head And A Square Neck That Prevents The Bolt From Turning While The Nut Is Tightened.

Zinc Plated To Increase Resistance To Corrosion

Hex Nut Included

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#TOP 8

ForgeFix Carriage Bolts | M10 x 300mm

Forgefix

CB10300M

Silver

M10 x 300mm

ForgeFix Carriage Bolts | M10 x 300mm | Zinc Plated | Bag 10

9.1

FTB Score

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Features

Ideally Suited For Timber To Timber Joining

A Round Head And A Square Neck That Prevents The Bolt From Turning While The Nut Is Tightened.

Zinc Plated To Increase Resistance To Corrosion

Hex Nut Included

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#TOP 9

15 Pcs M6 Coach Bolts

ALAHUGYEF

13D-169-ALA-UK

silver

M6*40mm

15 Pcs M6 Coach Bolts, M6 x 40mm Carriage Bolts and Nuts Set, Coach Screws with Flange Nuts, Cup Square Carriage Bolt and Nut Set, Carbon Steel

8.9

FTB Score

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Features

Square Neck Design: The Round Head And Square Neck Of M6 Carriage Bolts Prevent The Bolt From Turning When Tightening The Nut, Which Helps To Better Grasp The Material, And Is Very Suitable For Wood-To-Wood, Metal-To-Metal And Other Connections.

Stable And Durable Material: m6 Coach Bolts Are Made Of High-Quality Carbon Steel, Which Is Scratch-Resistant, Corrosion-Resistant, Rust-Resistant, Strong, Hard, Not Easy To Break Or Deform, And Has Long-Lasting Durability And Stability

Wide Application: The Size Is M6x40mm, Suitable For Machinery, Wood, Scaffolding, Vehicle Manufacturing, Accessories, Latches, Doors, Fence Exterior Walls And Other Fields.

Smooth Round Mushroom Head Design: The Smooth Round Mushroom Head Design Of Coach Bolts m6 Prevents The Screw Head From Opening Sideways, Suitable For Manufacturing, Glass Accessories, Metal Accessories, Wood Applications And Metal Applications.

Equipped With Nuts: Equipped With 15 Pcs M6 Nuts, Providing More Precise Installation, Protecting Parts And Hardware While Being More Stable, Extending Service Life, And Providing Strong Grip And Maximum Clamping Force

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#TOP 10

Merriway Zinc Plated Carriage Bolts and Nuts

Merriway

BH02151

Zinc Plated

M6 x 100 mm

Merriway BH02151 (4 Pcs) Carriage Bolts with Nuts, M6 x 100mm (1/4 inch x 4 inch) Zinc Plated - Pack of 4 Pieces

8.9

FTB Score

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The Merriway Carriage Bolts are a reliable choice for your fastening needs. This pack contains four M6 x 100mm bolts with nuts, making them ideal for various projects. Their round head design provides a clean finish, while the square neck prevents the bolt from rotating during installation. Following any included instructions ensures proper usage, allowing you to achieve secure and sturdy assemblies with ease. With these carriage bolts, you can enjoy convenience and reliability in your DIY tasks.

What We Like

High-quality zinc plating

Includes nuts for convenience

Secure round head design

Square neck prevents rotation

Editor's Notes

During our round carriage bolt research, we found 306 round carriage bolt products and shortlisted 10 quality products. We collected and analyzed 6,270 customer reviews through our big data system to write the round carriage bolts list. We found that most customers choose round carriage bolts with an average price of £4.57.

The round carriage bolts are available for purchase. We have researched hundreds of brands and picked the top brands of round carriage bolts, including mauuuba, Merriway, SZSLMY, sourcing map, SEIDER.

Written by

Corey Phillips

Corey Philips is an electrician and lighting expert. He graduated from the University of Birmingham in 2012 with a Bachelor's degree in electrical and electronics engineering. Corey is a specialist contractor in lights. He sells and installs and recommends lights and lamp sheds, and other lights accessories. Aside from that, Corey is vast in installing and maintaining electrical appliances like air conditioners, water heaters, and the likes.