call us:( 86) 53371081
fax:( 86) 53371080

taicang zhongbo railway fastener co., ltd.-凯发官网地址

316l tunnel bolt

we developed and produce m27 and m30 stainless steel bolt, a2-70, a4-80

based on the request from our customer, zbrf developed production of stainless curved bolt and spear bolts for tunneling in underground contruction. there are m27 and m30 at the moments, more size are available according to request from clients.


material for bolts could be 316l, mechanical property could be upto requirements of a2-70 or a4-80.

tensile strength of bolt with hex nut could be upto 321kn.

hardness of washer could be more than 200hv.

zbrf is a leading manufacturer of rail fastening, track work spare parts, tunnel bolts in china.
if you want to cooperate with us, you can get in touch with us by the following way.
  • no. 88, tao wan central road,
    shaxi town, taicang, jiangsu
  • ( 86) 53371081
  • ( 86) 53371080