... high strength bolts, screws, nuts, threaded rod, anchor bolt, nail, other off-standard fasteners and following to the drawers of ... ), DIN (Germany), GB (China), UNI, JIS (Japan), ISO and TCVN (Vietnam).1.Application:railways, highways, bridges, plants,etc. 2 ... part equipment as follows: High strength nexagon boits,nuts and wasners of ANSI standars with iargehead,nutsand washers for steel structrue