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BillA · 09-17-2004, 05:35 PM

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

09-17-2004, 05:35 PM	#207
BillA CoolingWorks Tech Guy Formerly "Unregistered" Join Date: Dec 2000 Location: Posts: 2,371.493,106 Posts: 4,440	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 Last edited by BillA; 09-17-2004 at 05:42 PM.