Black Carriage Bolts

Custom fasteners Manufacturer

Mushroom Head Black Carriage Bolts|Coach Bolts

Type: Coach bolts, mushroom head bolts, Black Carriage Bolts

Material: Carbon steel

Finish: Black zinc plated


Standard: Inches, Metric


What are Carriage Bolts

Carriage bolts are a form of fastener that connects two parts and are mostly used in the wood application, metal to metal or metal or wood. carriage bolt generally has a round head and a circular shank cross-section. the shark has no threads. carriage bolts are also as known as plow bolts or coat bolts. that can be made from a number of different materials, stainless steel, carbon steel, brass, etc

What are Carriage Bolts Used For?

the carriage bolt is greatly used to fasten wood to metal, metal to metal, and wood to wood. carriage bolts must only ever be screwed into the predrilled holes because of the particular shape of the carriage bolt’s head. However, Their particular shape allows the bolt to be self-locking when placed through a square hole.

Generally speaking, bolts are used to connect two objects and need to be used in conjunction with nuts, and a single bolt does not work for connection. The tool is generally a wrench. The head is mostly hexagonal, generally larger. The carriage bolts are used in the grooves, and the square neck is stuck in the grooves during installation, which can prevent the bolts from rotating, and the carriage bolts can move in parallel in the grooves. Since the head of the carriage bolt is round, there is no design of available power tools such as cross recesses or inner hexagons, which can also play a role in preventing theft during the actual connection process.

Black Carriage bolts are used in many different industries including waterproof conservation, the railroad industry, the arming industry, the mining industry, and more. which are commonly used because of their ease of use. They have an aesthetic appeal because of their smooth and dome-shaped head. also, the color can be any color like black carriage bolts which base on customer applications.

When we purchase carriage bolts, the most important is the quality. The bolts have to be corrosion resistant and longevity, especially when going to be used in exterior environments. they are two good choices, one is carbon steel material with a hot-dipped galvanized finish. another is stainless steel 316 with dacromet. However, stainless steel material normally will be more expensive than carbon steel.

Are You Looking For Custom Screw Manufacturer?

As a 20-year industry experience manufacturer with a factory equipped with precision machines, we can provide, from consultation to production, a one-stop solution for you. For an accurate quotation, you need to tell us the following information:


Please tell us the specific details, like what is material and finish do you, and the fastener size, if you have drawings or pictures, please send them to us


Normally small order quantities are acceptable, while large quantities can help us to lower the cost and get you a more competitive price.


Tell us your application or detailed information for your projects. We can offer you the best choice, meanwhile, our engineers can give you more suggestions under your budget.

What We Can Offer You..

Best Quality

We have rich experience in the manufacture, design, and application of custom fasteners, and served more than 10000 customers worldwide

Competitive Price
we have an absolute advantage in the cost of raw materials. Under the same quality, our price is generally 10%-30% lower than the market.

With more than 22 years, we already have completed the control system and test equipment, we can provide all tests you need


Any feedback will be replied to within 24hours, We provide a 3-5 years guarantees policy. And all costs by us will be on our account.

Fast delivery

If you need urgently, we can deliver samples within 8hours. Bulk order can be within one week

Why Choice us

Production Process

We have a variety of production requirements of equipment, can meet any customized demands. can provide comprehensive fastener solutions. Anything you need can make by Heatscrew.

Material Preparation

Threading Rolling

Automatic Lathe

CNC Process

Final Test

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