We have some Ju-88 parts in our museum, but your (crumpled) part doesn't look familiar to me. I know, that wasn't any help, but I wanted to reply anyway. Larry
Hi Martin
the captive nut on the second picture does ring a bell to me,
I found very similar ones indeed in Ju88 parts.
It is not a formal proof (if you can find a part number, this will help) but it looks very much like a Ju88 ..
best
Gilles