High Quality Curve Spear Tunnel Bolt for Concrete Ring

high quality curve Spear tunnel Bolt for concrete ring


Application:Permanently fix concrete tunnel segment

Material: Carbon steel or stainless steel----Q235, 35#, 45#, 35CrMo, 42CrMo, 40Cr etc.

Specification:Complete range from M16 to M30 diameters without Length limit.

Finishing;plain(oiled),sherardized,hot dip galvanized, white zink plated, yellow zink plated, black, dacromet, geomet or others specified by the customers

high quality curve Spear tunnel Bolt for concrete ring


TAICANG ZHONGBO RAILWAY FASTENING is a leading manufacturer and supplier of rail fastening in China. We are dedicated on supplying more better quality rail fastenings to the world railroad, and contributing to availability of more safety and convenient transit.
  ZHONGBO initially started from 2004, to 2011, it moved to current place, Shaxi Industry Park, Taicang, Jiangsu Province, east of China. The  site is about 23000 square meters. There are 320 staff in the site, of which, there are about 16 technical staff, and 112 junior and senior skilled workers; for testing and production facilities, there are more than 260 sets. Total assets is about 120 millions RMB, annual turnover about 180 millions RMB. The annual production capability is 36000 tons including rail fastenings, kinds of railway bolts, screw spikes.