[SEL] OT - what is NPT REALLY..........

[diesel at easynet.co.uk]

Quoting James Yost <jnyost at yahoo.com>:

> Bill,
> 
> Both are correct. I do not think you could win or
> loose on trying to see who is right or wrong.
> Engineers sometime refer it as taper but us common
> folk say thread.
> 
> Jim

I'd say National Pipe Thread is the correct term, as the thread comes (as does 
the British Standard Pipe thread) in both taper and parallel forms. Both are 
listed in the SAE handbooks that we have. 

Peter
-- 
Peter A Forbes
Email: diesel at easynet.co.uk
Web: http://www.oldengine.org/members/diesel

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