international 424 thread size and type

international 424 what type and size are these fittings? inlet to valve from pump and auxillary outlet seem to be the same size? seem real close to 1/2 pipe thread but they are straight thread with a washer
 

like this
100_2275_zpsa4coeqqt.jpg
 
When you said "with a washer" that makes me think of a fitting called ORB, which stands for O Ring Bore, I think. These will have an O ring near the open end, then a flat washer, and the angled fittings will have a jam nut, which locks the fitting in position, as well as forces the O ring down into the bore of the machined hydraulic component.
You can look at these fittings at the Surplus Center of Lincoln, Nebraska. They have a wb site that will show all kinds of adaptor fittings, including ORB to NPT fittings.
 
I was remebering something like that about that series,
just couldn't quite, thus the ? mark. It matches parts book better also.
W/O part in hand it's easy to confuse some of the fittings,
some are so close to another.
 

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