Tunnel bolts, also known as curved bolts or segment bolts, are used to permanently fasten tunnel segments to the numerous metal beams and columns that make up the tunnel frame through radius holes.
Kingrail Parts is a professional manufacturer of high-strength special bolts in China. We can produce metro or railway long tunnel curve bolts, curved tunnel bolts, segment bolts in various grades, sizes and load capacities.
We can also customize segment bolts according to customer specifications and drawings.
Specifications
Size: M16-M80
Strength grade: 8.8, 10.9, 12.9.
Pitch: 5H, 6H, 7H
Material: stainless steel, alloy steel
Standard: GB, DIN, ISO, ANSI, JIS, BS, non-standard
Coating: galvanized, nickel-plated, chrome-plated, blackened, Dacromet
Specifications of segment tunnel arc bolts
|
Dimension |
Arc Length mm |
Tensile Strength |
Surface Treatment |
|
M25～M39 |
480～880 |
4.6、4.8、5.6、5.8、8.8 |
Dacromet, Hot dip Galvanized |
Specifications of segment tunnel straight bolts
|
Dimension |
Arc Length mm |
Tensile Strength |
Surface Treatment |
|
M25～M48 |
480～880 |
4.6、4.8、5.6、5.8、8.8 |
Dacromet, Hot dip Galvanized |
Why choose Kingrail Parts
1. The production plant covers an area of more than 100,000 square meters, with 220 workers and 20 technicians
2. Our tunnel bolts meet international standards such as BS, UIC, DIN, ASTM, AISI, etc.
3. Passed ISO9001-2008 certification
4. Customized according to your specific requirements.
5. Our bolt products are exported to Asia, Europe, America, the United States, Germany, the United Kingdom, France, Thailand, Vietnam and other places.
Get more help
If you have a subway construction project, please contact us. We will give you the best segment bolt solution.
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