I'm confused - but that often happens these days!
CAT40 - ISO40 - INT40 what are the differences? My Beaver Partsmaster (I think) needs CAT40 - certainly there is no parallel extension above the taper, and the pull stud threads into a 16mm 2mm pitch hole - the the tools I have have a circumferential Vee in the flange and also a Vee notch in the periphery of the flange - though as far as I can see the Vee notch and Vee in the flange take no part in the tool changer cycle.
I've searched for drawings but google has let me down - my copy of machinery handbook is too ancient - any ponters?
AWEM