I just got a my own compressor and planning how I want to setup my fill station and came across some stuff today about thread types when searching for fittings on mcmaster so I wanted to see what kind of fittings/thread types everyone else uses or recommends. most of the high pressure stainless fittings on mcmaster have NPTF threads which are still NPT threads but they are held to a higher tolorence and are for a dryseal fit where normal NPT threads have a little wider tolorence and should be used with teflon tape or similar sealant. the main reason im asking is because im a machinist and plan to make some of my own manifold blocks and parts for my system but it looks like making / inspecting the NPTF threads is going to be a little bit harder but not sure if just regular NPT threads seal well under high pressure with teflon tape.