While stripping #50's inner fenders one of these square captive nuts came out. The rest of its kind seemed securely lodged in the sheet metal, so I didn't try too hard to remove them. I just plugged the threads with junk bolts to protect them from sandblasting and paint.
Are these square captive nuts supposed to come out? And are they held in by a spot weld or metal "legs" that are pressed down against the sheet metal?
Thanks very much!
Robroy