Overview COWL BUSHING R-RING MC69790-00 PN 05-01764 New, improved high-temperature, high-impact material that outlasts the originalnylon or glass filled Teflon? materials. These bad boys can take the abuse fromthe aerodynamic hammering of the rotating propeller pulses. Used on most PiperCherokee models. Includes the retaining ring (snap ring). COWL PLATE ASSEMBLY MC69791-000 PN 05-04476 Stainless steel mounting plate withMC69790-00 Teflon? glass bushing and MC484-840 retaining ring. Upper cowlretaining part for most Piper Cherokee models.