It's a large family of Jonsereds that have this same cap. 621/801/80/90 etc. In a pinch, you can use a threaded plumbing plug/cap.Anybody know where a fella could get an oil cap for a 621? Managed to snap mine off...
Yrs ago I was curious why a US plumbing plug/cap would work on these saws. The thread pitch & type for a metric plumbing application are very close. And since it's not a very precise type of thread, the US plugs work.
Kevin