- 1/4" BSP Copper Washer - pack of 3. This washer is suitable for use in 3 places - the main Oil pipe unions that screw into the crankcase (see second photograph), the Oil filter bolt that fits at the base of the timing case chamber or the sump plug hex bolt.
This washer is annealed (hence the none shiny appearance) and is therefore soft and suitable for this application. It is also slightly wider than normal making it suitable for each of the applications described here. However, for the drive side one way valve, or the straight through breathers/unions fitted to the SOHC Manx timing case, cambox oil pipe or front breather union (if fitted) - you might find the slimmer 0090c E5264-C2 is more suitable (or use an alternative fibre washer).
This washer is sold as a pack of 3 (sorry they are not cheap - this is because they are specials and annealed)