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Tunnel Construction Bolt

Tunnel Construction Bolt

We produce and supply three types of tunnel construction bolt. Detailed specifications are as follows.
1. Spear bolt with special pitches. The dia. is 20mm and the thread diameter is 24mm.
2. Hex flange bolt with round threads for metro and tunnels. The shank dia. is 22mm and the diameter of thread is 24mm. The length ranges from 230mm to 440mm. It is plated by yellow zinc.
3. Square flange bolt with round threads for tunnels. The shank dia. is 22mm and the thread diameter is 25mm. The length ranges from 400 mm to 560mm. It is hot dip galvanized.

Zhongbo Railway Fastening Company is a professional tunnel construction bolt manufacturer and supplier located in China. In addition to the tunnel construction bolt, we provide elastic rail clip, rail insulator, rail joint bar, etc. Due to reliable quality and reasonable prices, our rail fastenings are well received in many countries including North America, Europe, and Southeast Asia. If you are in need of our railway fastener, please contact us via the phone number or email provided on our website. We look forward to hearing from you.

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