Used passenger (right hand) side brakes shoe adjustor for Mercury Cougar or Ford Mustang. This screw assembly is part of the manual and self adjusting system for your drum brakes either front or rear. These have right and left handed threads depending upon which side of the car they are intended. Right side screws are identified by an "R" on the end of the screw under the socket and a two grooves machined into the pivot nut. Original Ford part number for RH or passenger side is C2OZ-2041-A, and the LH or driver side is C2OZ-2041-B. Clean Western part with no heavy corrosion like you see on Eastern cars.
Ford part # C2OZ-2041-A, for the passenger side.
*Installation Tip* Prior to installation, add a small daub of grease to the threads and under the socket to help the self adjusting mechanism.