Language
UNI 5597 - 1965
BS 4183 (T8) - 1967
GB /T 2153 - 1991
BS 916 - 1953
CNS 4377 - 1983
CNS 4378 - 1983
SAE J 104 - 1969
CNS 4067 - 1983
ASME/ANSI B 18.2.2 - 2010
DIN 798 - 1972