I have just about given up the goat for finding any thumbscrews to fit my 1983 Z coupe. I was wondering if someone out here that has the screws could pass along information about these fastners. I need to know the diameter, length, and thread pitch. I am trying to avoid carrying thet-top to the hardware store to find a fastner to fit.

 

I know I have one spare in my garage. I will take some pics & measurements tonight.