Headlight adjusters
 

I don't know if these are assembly line correct but they were purchased 25 years ago as NOS adjusters. The black vinyl nut has the number 60 on it.

Here is an aftermarket adjuster (apart) and screw next to the GM part. I believe this is plastic nut. (Google plastic vs. vinyl)



The GM adjuster is 1 3/4" repop is 2 1/4"

Anyone have a pic of assembly line pieces? Are they black too?