I only hand tighten & never have trouble.
BUT...You may enjoy this comedic cycle of errors...
Last week, I picked up a used keg that was pressurized & seemed to be in perfect working order.
I decided to use that keg for a batch of IPA...Sanitized everything, reassembled & made the transfer.
I hooked up the gas to pressurize & promptly got an IPA shower, due to a bent poppet foot.
So...I relieved the pressure & cleaned up...Sanitized another keg...Transferred & pressurized.
Then, I attached the Liquid Out quick connector, just to be sure I had flow...
Once again...I took an IPA shower.
Seems my wife had found my quick connector drying on the counter top & assembled it for me, without putting the rubber ring in place.
I grab quick connector #2...Guess what...
IPA shower, again!!!
Wife musta seen 2 connectors sitting on the counter & skipped the rubber rings, in both.
I can only assume that she thought the rings were hair binders, since they look nearly identical.
So...Luckily, I had a third connector that I was able to disassemble & verify contained a ring.
There was a lot of cleanup & laundry involved.
I will be ordering several rings, very soon.
I've already replaced all "iffy" posts & poppets.
Smile...At least you don't smell like an amarillo IPA.