This Remington manufactured chrome finished cover screw nut is for the Nylon 66 semi-auto rimfire rifle and is in very good condition with light wear. (file photo)

NOTE: Remington Nylon 66 rimfire rifles with the following year/serial number have been observed with the following part: 2136810

(LM) February 1965, (DN) September 1966, (RN) November 1966, (CY) April 1974 & (EY) October 1974