Work fine, but not for my purpose
Pay attention to the hole size on the MPT thread side. For some odd reason, the hole diameter is much smaller compared to other similar compression fittings. As a result, these fittings did not fit onto my 1/2" FIP faucet connector which I use to connect to my chiller. My mistake. I should have paid more attention to the pictures or asked the question. I was able to make work using a PVC fitting for the transition.
Reviewed by: Keith Zielinski