Thread/size used in L series front hydraulic block

[whitetiger]

View attachment 60775
when I see the seal takes place by ‘deformation of the threads’, that kinda speaks to an old service guy (35 years) such as myself that worked on instrumentation that went as high in (liquid) pressure as 28,000 psi and as low in vacuum as 2x10-7 torr.
To each his own...

We are dealing with a tractor and a little over 3000PSI. They work well in this application, simple and trouble-free.
There are a large number of regular posters on here with this exact set up, I do not see many posts about the adapter fittings screwed into the aluminum distribution plate.