When I removed oil pan to reseal it, this bushing/spacer/washer fell out and I have no idea where it goes. This is a 1949 engine.

Size is approximately 1/2" to the outside 5/16" on the inside and 1/4" thick. see pics

Any ideas?
thanks 49nut

https://www.dropbox.com/l/s/wPmenbtvtHd4ITK0vARNHt

https://www.dropbox.com/l/s/4Sf31CTN6hWeEpjm0IKdlp