Somehow I missed all the comments about set screw types. So I lent to NAPA just down the street. And bought a set screw. I was a little longer but same threads and 5/32" drive. Then I got to wondering and looked for discussion threads on set screws. So I came back here to post a comment that said I had found out that I could not use the set screw I had gotten.
That's when I found all the comments you had given me! At least it worked out. Thanks for trying to save me from myself ;-)
Cannot remove set screw from drill chuchp
Moderator: admin
Set screws
Sam in Northfield, MN
A day without beer......could have been better

Mark V 500 - S/N 100990, Mark V 510 - S/N missing, SS Band Saw, SS 6" Belt Sander, SS 4" Jointer, SS Scroll Saw, SS DC3300
A day without beer......could have been better
Mark V 500 - S/N 100990, Mark V 510 - S/N missing, SS Band Saw, SS 6" Belt Sander, SS 4" Jointer, SS Scroll Saw, SS DC3300