[Hansfragger]

Originally Posted by unregistered

plug and ring gages are the inspection tools to determine if the threads are 'in spec', or not

'out of spec' threads may be made for a variety of reasons, indeed the excessive engagement of thin plastic threaded male pins is a problem
- but IF the mfgr chooses to make such, compatibility with good threads may then become the problem

Dan
"Oh and welcome to NPT land." - by this you mean what ?
that you call a thread NPTF is not the same as stating that the threads are 'in spec' - when clearly they are not
(Dan - I used to perform API thread insp on tooling and components, I do not need to see the thread to understand that if it cannot be started it is wrong. I trust you are not implying that the barbs that do not fit are off spec.)


a difference between C-Systems and Swiftech's engn/QC seems apparent

EDIT: NPT vs. NPTF
a description here

Thanks for the great link. I was trying to order a 1/4 NPT tap from Grainger and they didn't know the difference between NPT and NPTF-thought it was National Pipe Thread Fine.