UNJC Threads into a UNC Tapped Hole
UNJC Threads into a UNC Tapped Hole
(OP)
I have a drawing call out from the 1960s from a certain government agency which calls out a UNJC Stud and Self Locking Bolt, however the hole call out is for a UNC-3B Tapping.
I am trying to assemble a list of Engineering Change Orders and I was wondering if anyone here had experience with the UNJC Thread Series who might be able to answer my question.
C
I am trying to assemble a list of Engineering Change Orders and I was wondering if anyone here had experience with the UNJC Thread Series who might be able to answer my question.
C
Taking the science out of rocket science...One step at a time.





RE: UNJC Threads into a UNC Tapped Hole
RE: UNJC Threads into a UNC Tapped Hole
Any help?
KENAT, probably the least qualified checker you'll ever meet...
RE: UNJC Threads into a UNC Tapped Hole
I didn't see where it answered the question, though. In a previous life as a designer at a world-class electro-hydraulic servovalve manufacturer, we often used hydraulic fittings with a UNJ thread, but we would not specify UNJ on the mating hole. as it was determined that the female UNC thread would clear the root of the stud thread, and performance wasn't supposed to be effected. I have never heard of the practice causing any problems, and am interested in learning if this was indeed acceptable or just poor practice.
RE: UNJC Threads into a UNC Tapped Hole
Taking the science out of rocket science...One step at a time.
RE: UNJC Threads into a UNC Tapped Hole
KENAT, probably the least qualified checker you'll ever meet...