TB/T 2347-1993
Class 8.8 high strength insulated joint bolts
TB/T 2347-1993
Class 10.9 high strength insulated joint bolts
TB/T 1479-1991
Axle end bolt for rail vehicle axle-hexagon head bolts for rough pole
TB/T 1479-1991
Axle end bolt for rail vehicle axle- hexagon head with hole bolts for rough pole
TB/T 1479-1991
Axle end bolt for rail vehicle axle-hexagon head bolts for fine rod
TB/T 1479-1991
Axle end bolt for rail vehicle axle-hexagon head with hole bolts for fine rod