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ISO 2491:1974

M00000037

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ISO 2491:1974 Thin parallel keys and their corresponding keyways (Dimensions in millimetres)

standard by International Organization for Standardization, 08/01/1974

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Also specifies 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. It is recommended that the values given be adhered to even for special applications.