Need the disc-like screw that holds the engine cover on my 2003 Tbird. Thanks

[Micke]

Hello, my mechanic lost one of the round black screws that hold the engine cover on my 2003 Tbird. Anyone have one I can buy? I've asked all junk yards in my state and Thunderbird Bob.Thanks so much!

[merlot4]

If it's what I'm thinking of, its part number w708656-s300 and they're called screw on retainer nuts, or caps. If what's in this picture is what you seek, here's a source.
.

https://salesbuys.ru/product/267309746551

or

https://www.ebay.com/itm/267423060501

[Micke]

That's exactly it! Thanks so very, very much merlot4 !!!!