Adapter Rear Brake Line to 2282 Hose - 1 Per car

This part is not original. The original design of the rear flex hose 2282 is machined for a 1/4" double flare. The rear half brake line is only a 3/16" double flare.
Steel lines seem to work without the adapter.
However, particularly when trying to seal stainless steel hard lines, using a brass adapter will provide a much easier to seal junction.