What are these called ?

[anlauto]

...and where can I get some ?
They go on the back of a 1971 Cuda grill and create a retainer for the two screws that hold each headlight bezel onto the grill

[anlauto]

I see Roseville Moparts and R/T Specialties carries them, does anybody have a cheaper source ? Maybe Amazon or eBay ? What are they called ?

[mopar jack]

They are called on-certs, I finally found a source. https://www.huyett.com/products/fasteners/engineered-fasteners/self-locking-threaded-nuts/efos-nr832006-598-b

[anlauto]

Thank you...that's why I love this site