Are the air cleaner and power steering "Star" nuts identical

[Lee Craner]

Graham, do you have a photo of that washer?

[Graham Rollo]

DSC09366.jpgDSC09367.jpgDSC09368.jpgDSC09369.jpgDSC09370.jpg There is a small hole in the middle of lid & along with the washer that has a groove cut that allows air out. you can get a washer & use a hacksaw to cut a groove in it, regards Graham, New Zealand

[Barry Wolk]

Why the small hole? There's plenty of space in the lid clearance hole to relieve air pressure. I don't think I've ever seen sufficient fluid in mine to need a drain hole. I don't think it would help, but I guess it wouldn't hurt.

I made my cut washer out of stainless so I didn't have to break a plated surface.

[Graham Rollo]

Thought the small hole was factory.

[cparkerk]

Mine not only has the small hole, too, but there also is a plastic socket. That comes first, then the washer (grooves facing down towards the plastic socket), then the nut. Apparently avoids scratching the reservoir lid.

[Lee Craner]

Now this all makes sense. Thank you Graham and Konrad for posting the pictures.