Not sure if this should go here or in the glass panel side, but I need a crush washer for the oil temp sender for a Lycoming IO 360 A1A. I am putting a Dynon 5/8-18 UNF oil temp sensor in and cannot find a crush washer any were, tried Napa and a few other auto parts store with no luck. Does anyone have a good source and maybe a part #? Thanks Matt