Metro bolts, sometimes called subway bolts, are a general term for certain types of bolts often used in subway construction.
Kingrail Parts metro bolts mainly come in three specifications: Φ22×410, Φ25×395, and Φ28×556. The mechanical properties all reach level 8.8 in the ISO898-1:2009 standard.
Specification:
| Size | Grade | Material | Surface treament |
|---|---|---|---|
| φ22×410 | ISO898-1:2009 standard, grade 8.8 | 45# | Hot dip galvanized, thickness of zinc layer ≥43μm |
| φ25×395 | Hot dip galvanized, thickness of zinc layer ≥43μm | ||
| φ28×556 | Natural color |
Metro Segment Bolts：
* Segment Tunnel Arc Bolt Specification:
|
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 |
* Segment Tunnel Straight Bolt Specification:
|
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 |
Kingrail Parts can customize metro bolts to customer specifications and drawings.
Contact us
Please contact us for more information and quotes.
Inquiry Now