Posted by:
roger wilson
(---.hsd1.mn.comcast.net)
Christopher,
If you are close to a hardware store, just put the chuck into your pocket, hop into your car, drive to the hardware store and try screws until you find the one that fits perfectly.
It is quite possible that the screw is a metric screw. So when checking screws, check the metric screws as well.
If it is SAE screw, it is likely a 6-32, 8-32, 10-24 or 10-32. But, I think that the screw is smaller than a #10. -- from my memory of the time that I had one of those chucks.
When you check the screw size at the hardware store, you also need to verify the pitch of the screw. i.e. fine or course in either sae or metric.
I assume that you are speaking of this chuck:
[
www.mudhole.com]
I assume that you are looking for the phillips head screw that has its head visible on the left side of the picture.
Good luck
