This is the plain washer needed when fitting the heater tap. This is also known as the summer and winter valve (UD3984). 1956-1965 Silver Cloud I,II,III, S-series, Continental & Phantom V  

This is a plain washer fitted for UA9243Z hex head thread cutting screw. These are found on the exterior body.EGR system, LHD handbrake, Exhaust, Throttle Linkage, Gearbox Cooler Hoses & Pipes,...

This is a M4 plan washer:  LH and RH side door mirrors & hook retention finisher for the windscreen 1980-1995 Brooklands, Corniche, Mulsanne, Spirit, Spur (VIN 01001-58291)

This is a 2BA Plain Washer found in several areas of the car. 1966-1980 Vacuum Control Switch Mounting on the EGR system, Pedal & Linkage RHD & LHD, Air Conditioning Relays & Ducting,...

This washer is found all over the cars from 1955-1997 Front Door Hinge Transmission Gear Change Volute Casing Thermostat</