Size No. Brass | Size No. Alum | Tube I.D. | Thread Size |
---|---|---|---|
4 | 4D | 1/4 | 1/8 |
AN840 HOSE NIPPLE, Pipe Thread |
Works as designed.
These work great and are always better than for aerospace applications.
There were seams on each side of the threads, likely due to the fact that this fitting is produced by casting without post-cast machining or forming of the threads. I got it to form a seal using thread sealant.
AN Fitting AN840-4 Brass
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The AN840-4 has 1/8" NPT and a 1/4" nipple fitting. It can be used on a Facet pump with 1/8-27 pipe thread.
The "TUBE I.D." column is in reference to the rubber tube inside dimension to be used on that unit. These units have national pipe thread, which is a tapered thread, and not measured to identify the listed size, but if the hole has NPT threads, and is approx 1/2", then you most likely need a 1/4" NPT threaded unit. The AN840-6D is an aluminum fitting that has 1/4" NPT & would use a 3/8" I.D. rubber hose.