Hood coil spring unwound

it looks like it’s called an axle hat nut or a type of push cap nut.
made to go on 1 time and not come off. Used for radio flyer wagons. Size is 1/2” and fits very tight on there.

the one on top and bottom are the same size. It was also used for wagon wheels. It also moved 1/2“
the internal tooth ring washers from lowes…….
did not fit.


id like to go back factory style with this