[Grubby]

Bob,
I think you may be correct.

The major dia of my screw is .1775" which is certainly too small for a 10-32. As a comparison I measured my 10-32 tap and it was .190" which is right on the money per my books.

The thread pitch looks really close to 10-32. However, it is so small it is hard to count.

PM me if you have one and I will call you with my CC info.

John Grubbs