A15-3

1/2 x 20 unf male steel nut with non threaded lead, SAE (double) flare, .755” long. Uses 9/16” wrench. Mopar, Chrysler only master cylinder brake line nut for use with 3/16” o.d. tubing with SAE (double) flare. As the name implies, this is found most often at the master cylinder but may found at ABS units and other places.