ISO 2491:1974废止
Thin parallel keys and their corresponding keyways (Dimensions in millimetres)
出版：International Organization for Standardization
专家解读视频
Gives the material of the keys, gives the relation which should be observed between the diameter of shaft and the section of key, and is of general application for cylindrical shaft ends.
KS B ISO 2491:2003 - Identical
KS B ISO 2491:2015 - Identical
PN 91/M-85002:1991 - Identical
NBN E 27 709:1974 - Identical
NBN E 27 708:1974 - Identical
UNI 7510:1976 - Equivalent
NFE 22 177:1987 - Similar
NFE 22 175:1987 - Similar
