Help find a source for 1/4 inch straight pipe thread fitting

[Lynn Eades]

Robert, look at how the fittings seal. If there is a seat of some sort the fitting will be parallel. I have no experience with that valve but the earlier (CO1UC?) valve has special fittings that are BSP/ SAE if I recall. You need to carefully establish what the threads are. The BSP is quite course while the SAE is relatively fine. I hope that helps.

[Robert Bergeron]

Thank you Ron & Lynn . I have everything i need to order now . Very helpful advice ! Cheers .

[Paul Dutton]

From a ‘Brit’ hydraulics engineer, BSP is parallel thread, BSPT is taper.
On the tube we measure the OD (outside diameter) and with hose / flexi we measure the ID (inside diameter) There are a ‘few’ times we measure the ID of tube, but on modern sizes it’s the OD.
As for the nut threads, yes a 1/4” tube can have a 5/16 thread, but normally they are matched. You can get BSP or METRIC in both, pre formed ends or compression olive (ferrule think you might call it in places)
SAE or flared ends as pre forming the tube ends into a flared face, like brake pipe flares etc.
All these are readily available over here if anyone has problems.
Instead of trying your Auto stores or truck places, try the smaller, longer established hydraulic places.
Hope this helps guys

[Robert Bergeron]

Thanks Paul , clear as mud now. Put in an order with Green Spark Plug .... Cheers .