1) American System (ANSI/ASME)
2) Germany (DIN)
3) British System (BS)
4) Australian System (AS)
5) Guo Biao (GB, China National Standard)
6) Japanese System (JIS)
7) ISO Standard
widely exported all over the world like America, Europe, Middle East, South Africa, Asia Etc.
(USA, Canada, Mexico, Chile, Brazil, Panama, Argentina, Peru, Spain, Vietnam, Malaysia, Korea, Thailand etc.)