So what to do? For no reason I can think of (other than the bourbon) I stuck a small piece of paper towel in between the metal parts and then put a moderate amount of super glue on the piece of paper towel. Hold the metal/paper towel/super glue sandwich together tightly for 30 seconds... and it sticks together! I tested the bond about 30 minutes later and it seems strong.
No more holding metal pieces together for 5 minutes like a dope for me. Thank you, mama necessity.