Ø Standards: GB, AREMA, ISO, UIC,AS,BS etc
Ø Grade:8.8, 10.9
Ø Material: carbon steel, stainless steel
Ø Surface: plain ,HDG ,Black or as customer requirement
Product Center
Tunnel bolt
circumferential and ...
The tunnel bolts are divided into circumferential and longitudinal.
Back listProduct description：
We are capable of producing various types of tunnel bolt, including curved tunnel bolt , spear bolt ,customized bolts are also available according to your drawings or samples ...
Product technologies：