Sorry guys I've been out of pocket a bit. After talking with Fastenal (and finding out they didn't have anything that would work) they gave me a local shop that makes hydraulic lines and the like that has been around for quite a while. I learned quickly that there's a whole lot about fittings that I didn't know in regards to now some things are referred to now as a "No. 4" for example. Learning curve here.
Didn't see anything on Grainger or McMaster Carr sites but a phone call wouldn't hurt to verify. Thread gauge tells me they are 27 and they are straight threads.I got the 3/8 (5/8 diameter) from the fact that a 3/8 compression male fitting would go in about 1turn and stop. The solder idea for some new threads does sounds alright. If I were to come up with a 24 pitch tap and die I do understand that would chew up the threads quite a bit but do you think adding blue locktite would give enough fill/bite to run up to around 140 PSI air without leaking?
