| Customization: | Available |
|---|---|
| Type: | Round Steels |
| Standard: | GB, ASTM, DIN, JIS |
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| Product Name | Tunnel Bolt /Segment Bolt Rock Bolt /Anchoring for Tunnel Construction |
| Material | Carbon steel Q235, 45# steel, 40Cr steel, 316,etc |
| Finish | hot dip galvanized, black, dacromet, zinc,ect. |
| Standard | DIN, GB.,or customized |
| Grade | 4.8 6.8 8.8 10.9 12.9 |
| Size | M20~M56 |
| Application | Tunnels and underground exacavation |
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