What is this

[Idaho fish]

This fell out when removing passenger side fender from my 68 notchback. Does anyone know what it is and where it goes.

 

[Minercar]

It is a spacer washer for aligning the panels contour with t.he door

 

[Idaho fish]

Thanks

 

[Oldmanmopar]

Probably had it under the stud at the back of the fender.