... (America), DIN (Germany), GB (China), UNI, JIS (Japan), ISO and TCVN (Vietnam).1.Application:railways, highways, bridges, plants,etc. 2 ... & America & South Africa etc. Product name: Track bolt and nut Model: As per machine Material: 40Cr Processing: Forging Size ... business, thank you and look forward to the co-operation with you. Track Bolt and Nut, Nuts and Bolts, Spare Parts with CE certifation