Parker 51 Aerometric Front End Adapter

FRONT END ADAPTERS FOR PARKER AEROMETRIC PUSH ON: (NON-THREADED) SAC PROTECTORS.  These are used and fit Parker Standard sized Aerometrics They won't fit Demies, which are about .020" smaller in barrel inside diameter. These adapters slide into the NON-THREADED (both open and closed) sac protectors. These smooth ones go with sac protectors with the "....PRESS FOUR TIMES..." verbiage. THREADED: STANDARD SIZED, THREADED SAC PROTECTORS.  These screw into Aerometric sac protectors with internal front end threads. These are newly made for Parker standard sized Aerometrics with identical form, fit, and function as the originals. They won't fit Demies, which are about .020" smaller in barrel inside diameter. These threaded adapters are used on the metal sac protectors with the "...PRESS 6X..." verbiage.   (The metal part shown in some photos is not included with the item.)