Clutch-head fasteners: what makes, thru what era?

I know anybody who has messed around with Tri-5 Chevys and Chevy trucks through at least '62 has encountered clutch-head fasteners. They're also on Holley carbs.

For the Chevy guys, when did they stop using them--on cars and trucks, if possible.
For Ford and Mopar guys, did they ever use them, and if so, thru what years?

-Brad

 

I think chevy used the clutch heads thru at least the 1st series 55 truck.


jerry

 

clutch head??? I thought that was a camper/RV industry-only thing!

 

Early 80's Chevy 2-Ton Step-Vans(bread trucks) used them on mirror and body brackets.

 

made it onto 58-59 trucks as well, I have sockets and screwdrivers for them...

 

They're on the Chevy trucks at least thru '62, and I'd be very surprised if not '63, since I found them holding the window lift mechanisms on my truck.
Try to find out how long after that they were used. (doing a little research for a story)

-Brad

 

I didn't find any on my '65 C-10.....

Rich