OK - that got your attention, but it's not that.
Need a Greenlee double "D" knockout punch. Or equivalent.
3/4" x 2/3" - .75 x .67
It used to be a common size for electronics chassis - used to be............... that is 40+ years ago.
Some upward tolerance is OK.
Doesn't seem to be made now.
Ideas? Thanks guys.
Last edited by wwillson; 09/21/18 08:16 PM. Reason: subject clarification