Kingrail Parts is the largest manufacturer of tunnel segment bolts in China. We can produce high-quality segment bolts in various sizes and types.

Our segment bolts

1. Double-head straight segment bolts

2. Double-head arc segment bolts

3. Hexagonal arc segment bolts

4. Hexagonal arc thread segment bolts

5. Hexagonal flange arc thread segment bolts

6. Non-standard segment bolts Tunnel segment bolts

Material: Q235, 45# steel, 40Cr and other materials

Grade: 5.8, 6.8, 8.8

Surface treatment: hot-dip galvanizing (hot-dip galvanizing), Dacromet (commonly known as zinc-based chromate), powder shearing, multi-composite powder shearing, etc.

Our production plant covers an area of more than 100,000 square meters, 120 workers and 20 technicians work together to ensure that our segment bolts meet international standards such as BS, UIC, DIN, etc.

The tunnel segment bolts and related parts produced by Kingrail Parts are manufactured in accordance with ISO9000:2008 and have been approved by the China Railway Product Certification Center.

We can also customize according to your specific requirements. Our mission is to fully meet the needs of our customers.

We have more than 20 years of experience in designing and manufacturing tunnel segment bolts, and our bolt products are exported to Asia, Europe, America, the United States, Germany, the United Kingdom, France, Vietnam, Thailand, etc.

If you have a tunnel construction project, please contact us. We can provide you with the best segment bolt solution.