AN Power Steering Hose

It's not the threads so much as the type of fitting. Some of the older GM boxes used a 3/8 tube inverted flare fitting, but with the nut size that would normally be found on 7/16 tube, AKA larger than normal thread. Many of these fittings (don't know what they are called) look somewhat like inverted flare, but they have a protrusion on the end for an o-ring seal.

"Used to be weatherhead" hydraulic fittings (and other brands now) make/ made some interesting fittings for general repair.

This is one I picked out of my memory, 06U-755, it's a heavy duty compression fitting X 3/8 crimp on hydraulic (2 braid) hose end. You cut off your bad hose, assuming enough of the steel tube end is OK and this clamps onto the steel tube

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This one I found from an Aeroquip side, weatherhead used to make some of these for power steering, either straight, 90, or 45 bend This is the forementioned inverted flare

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