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threads
Posted: Thu Apr 18, 2013 12:44 am
by johnp
i have a strange thread on my boiler. i think its called dash6? its not british but close, its not npt. what is dash6?
Re: threads
Posted: Thu Apr 18, 2013 3:04 am
by Oilking
John,
The attached site should answer your question. It appears that dash6 is 3/8-18 NPT and a number of differant animals for flare, o-ring and many more in the 3/8 range.
https://www.checkfluid.com/images/Thread_Guide.pdf
Steam On!
Dave
Re: threads
Posted: Thu Apr 18, 2013 6:42 am
by gondolier88
It could also be 5/16 UNC.
Greg
Re: threads
Posted: Fri Apr 19, 2013 4:35 am
by Lopez Mike
In aircraft fittings and fasteners the suffix -6 means six sixteenths of an inch. As said, there are a bunch of various 'pipe' fittings other than our usual NPT tapered standard here in the U.S.
Brake lines and hydraulics and fuel and I don't know what else. Bet you that you could clean it up with a 3/8 pipe tap or die and it would work. Our pressures are so low compared to hydraulic stuff that the forces are surprisingly low. Let's see, 3/8" diameter is .11 square inches so at say 300 psi there is only 33 lbs trying to push a fitting out.
Mike