Fastener type help

[Eric's.64.Superwildcat]

I could use some help with the name of this fastener head type. I did a Google search without success.

It is from the 'gearbox' on my '64 power seat. I am looking for name of the tool that will seat into the fastener head properly.

Let me know if you need a photo of the 'gearbox' that I'm referring to.

Thanks.

[steelman]

GM called these "clutch head" bolts or screws. Really hard to find screwdrivers or sockets for these. These were used a lot in Chevrolet pickups in the 50s and early 60s. Check with Eastwood, I think they still offer these in their tool catalog. Snap-On and Matco used to carry these,but have since discontinued them.

Edited March 8, 2014 by steelman (see edit history)

[steelman]

Eric, one other quick note. The heads on these strip really easy. If you find a tool. You can't put a lot of torque into this connection before the tool jumps out of the head. Way worse than any Phillips head does. If possible, add a little heat to the screw to break the rust loose before you try to turn these. I have found that really helps with these heads.

[Eric's.64.Superwildcat]

Thanks Steve. That's what I needed.

I already removed the fastener and it was fairly easy. However, when I reassemble everything I want to do it the right way. Now I know I can get there from here.

Thanks.