Male Stainless Quick Disconnect x Male 1/2" NPT

Quick connects

The 1/2" Male connectors do not seal properly with the female ends. They are about 1/32" smaller diameter than the ones I got from another supplier and don't seat against the o-ring causing constant dripping.

Stainless quick disconnect

Works well, no leaks. I use them for all connections in the home brewery

Male s/s quick connects

It’s a plumbing fitting. Works as designed.