On p. 380 there are four examples of coaxiality controlled by TOP. The first example is pretty straightforward. The second and third are identical other than the appearance of the callout. Would a 20.07 diameter ring gage as long as the part be an appropriate functional gage for this?
The fourth example is also unusual. If my interpretation is correct, a 24.65 diameter ring gage with a 34.65 diameter counterbore would properly gage this callout. Is this correct?
Thanks,
Keith