Name
Curve Segment Connecting Carbon Steel Bolt Subway Tunnel Segment Bolt
Service
Manufacturing, Designing, Packing,OEM
Manufacturer
Nantong Trans
Surface treatment
Hot zinc impregnation, Dacromet treatment, hot dip galvanized
Grade
4.8,6.8,8.8,10.9,12.9
Color
Black coating,silver white, customer requirement