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ISO 7647:1986
Commercial vehicles and buses - Gearbox flanges - Type S
Specifies the nominal dimensions and tolerances which affect the interchangeability between gearbox flanges and mating parts used on commercial vehicles and buses. The flanges type S are not interchangeable with type A flanges dealt with in ISO 7646. Some figures illustrate shapes and reference quantities of concern.
International Organization for Standardization [iso]