Fiber washer
Inner diameter: 38mm
Fits:
Oil tank cap: 65-8500
Inspection cap for aluminum primary case BSA A7, A10, B33 and B31: 65-3364
Inspection cap for gearbox BSA M20, M21, B33 and B33 1948 up
Rockerbox cap for BSA B25 / B50 and Triumph pre-unit: 70-1564
Part numbers for this washer: 67-0042, 40-0969
