1972 oil door fastener question

[422flat6]

The oil door on my car is attached with two bolts. One bolt threads into a captive nut fastener and can be R&R with access to just one side (from inside the oil door). The other bolt is held on by a bolt and a regular ny-lock nut on the opposite side. R&R of that bolt requires access from both sides which requires draining the oil and removing the oil tank. Judging by the PET, both bolts should thread into captive nut fasteners. The holes in the sheet metal are stamped square.

I'll be having some minor paint work done soon and it will be a good opportunity to fix that properly. Could someone tell me what the captive nut fasteners are called so I can source a replacement? Is there a DIN standard number?

[edmayo]

Don't have the parts book here, but I'll bet that nut is a part of the tank well, ie welded in during manufacture and possibly not listed separately. Your body shop may have to get creative and weld in a nut from the front side, since access to the back would involve cutting off the fender. Weld a nut to a washer then weld in washer from the inside of the well, finish down welds.

[422flat6]

Thanks Ed. I'll drop the tank and take a closer look next time I change the oil.

[Florio]

Hi, I took a look on our 72 Targa that is appart. Ed is right, there are two nuts welded to the back of the well for the oil fill. From the feel of it, the small nuts are welded to a washer to increase strength. I tried to take a pic, but there is not much room there. In your place, I would consider either J-B welding the un-captive nut, or (recommended) cutting out a rectangular piece encompassing the two holes. (You could also cut out the entire oil flap assembly.) Then, you can weld the nuts in place and weld the piece back in. With a bit of skill and patience, it will come out fine.

Good luck,

Dario

[422flat6]

Thanks for checking and confirming that Dario. Much appreciated!