The strange thing was that the origonal screws threaded into the nuts just fine. The new ones would thread in until they reached the end of the nut...then they just stopped.
I have 7 of the 8 original screws. 1 of them was stripped and had to be drilled out. I figured the new screws might be a little different. That's why I got 8 new ones instead of just 1.
Doesn't hurt to work in a machine shop sometimes.
You got that right. My father-in-law just retired from Oral-B a couple months ago. He working in the machine shop there. Last weekend he made me an antenna nut installation tool. About 10 years ago, Oral-B got all new machining equipment. The old stuff still worked perfectly...they just thought since it was old, it had to be junk. My father-in-law bought a lathe cheap and has it in the corner of his shop.