Round Head Bolts

Why Choose Round Head Bolts Instead of Hex Bolts?

Many customers choose round head bolts because they combine fastening performance with a cleaner finished appearance.

Unlike hex head bolts, the rounded head has no exposed corners, reducing the possibility of scratching surrounding components or operators during use. The smooth profile also makes the fastener suitable for visible installations where appearance matters.

When paired with a square neck design, the bolt locks into the mounting hole and prevents rotation during tightening, allowing installation from one side while improving assembly efficiency.

For applications involving frequent contact with people, cables, or moving parts, round head bolts provide additional safety by minimizing snagging points.

Product Parameter

Surface Treatment Options

Surface treatment directly affects corrosion resistance and service life.

We offer various finishing options according to the operating environment.

Customers may select different coatings based on indoor, outdoor, humid, or marine environments.

Manufacturing Process

Every DONGSHAO round head bolt passes through multiple manufacturing stages to ensure dimensional consistency and mechanical reliability.

1. Raw material inspection
2. Cold heading or hot forging
3. Thread rolling
4. Heat treatment (when required)
5. Surface treatment
6. Dimensional inspection
7. Mechanical property testing
8. Packaging before shipment

Strict quality control helps ensure stable performance across every production batch.

Frequently Asked Questions

Q1. What is the difference between a round head bolt and a carriage bolt?

Many people confuse these two fasteners. A carriage bolt normally includes a round head with a square neck directly beneath the head, which locks into wood or square holes to prevent rotation. Round head bolts may be manufactured with different neck designs depending on the application, making them suitable for a wider range of fastening systems.

Q2. Which material should I choose?

The material depends on the working environment.

Q3. Can you manufacture non-standard sizes?

Yes.

DONGSHAO provides OEM and ODM services. We can manufacture according to customer drawings, technical specifications, or physical samples, including customized diameters, lengths, thread types, head dimensions, and surface finishes.

Q4. What standards do your round head bolts comply with?

Products can be manufactured according to various international standards, including:

Custom specifications are also supported.

Q5. How do I choose the right surface treatment?

The coating should match the service environment.

Q6. Do you provide quality certificates?

Yes.

Material certificates, inspection reports, dimensional inspection records, mechanical property reports, and third-party testing can be provided upon request.