Air cleaner thermostat question

Tinnerman nuts, IIRC. They dont look anything like the previous post. They kinda resemble a star washer but with the points on the inside. They are usually "pushed on" with a small socketdriver, hence the common "push-nut"name.They shouldnt be hard to find.And if you arent too fussy some of the other pictured ones will work. I like the hex type cause they ars removeable.