Technical Sump plug washer

[tinyfiat]

Can’t check the size of the sump plug washer on my classic 500 without removing the plug.
Can someone let me know the inner and outer diameter so I can order ahead of my oil change.

Thanks

 

[Jockstrap]

Be careful the sump hasn't been retapped.

 

[Toshi 975]

Standard steel sump plug does not have a sealing washer, the plug has a tapered thread to lock in tight.

 

[wingless]

Correct, engine oil pan drain plug has pipe threads w/o washer.

 

[tinyfiat]

Thanks everyone!
Now I know why it was hard to find the washer online.