All applications 1967-1973 Cougar and Mustang, attaches the drive shaft U-Joint to rear end pinion yoke. Sold individually, two required per car, complete with self locking pinch nuts. Perfect used, no rust or worn threads, these clean up nicely with your benchtop wire wheel. Note, OEM came with fine threads and no lock washer.
Ford Part #: C1AZ-4529-A or D3AZ-4529-A.