I just had a new Lemforder captive nut "let loose" in the frame upon installation.

2.5 hours later I had it out and reused the original 30 yr old part. I was fortunate that I was able to get it loose by wedging a screwdriver against the flat.

I'm pretty frustrated with CRAP parts these days. Yesterday I had to machine 100 thousands of an inch off of a Karlyn upper control arm inner bushing as it wouldn't even fit in the chassis.