Ohhh, I did not realize you were looking for the actual Notch.
The Field Super or Foreman need to maybe talk with the guy's and make it a standard that the shop will be supplying 1" Flanges. Bending over or trying to bend over all those Tabs is time consuming and difficult especially on heavy gauge. Then reaching in with tongs to try and tighten them up!!! 1" Flange and Zip screw it!