Edison hardware question

[Radio Ron]

I have a C-200 I'm working on. When I tried to remove
the turntable mechanism from the housing I found that
one of the large flat head screws was rusted tight.
After trying several different things I resorted to drilling
out the screw from the bottom going through the nut with
larger and larger bits until it gave way.
I thought, no problem, I'll just go to the hardware store
and buy a replacement... NOT SO easy it seems.
I took one of the other bolts that came easy with me today
and while to my calibrated eyeball it looks like a ¼-20,
it isn't. Nor is it anything else they had.
I assume you guys can tell me what to look for.
I had no idea they had different size hardware back then.

[Brad]

Ron,

I don't know what the thread stats are for DD machines, but I needed one a few years ago and couldn't find anything in the many many coffee cans of screws I have. I ended up buying a set from Don Gfell. You will probably find you'll end up doing the same thing.

Good Luck,
73's

[antique1973]

Been there before. It seems like there is nothing at the hardware
store that matches the types of screws you will find in antique
phonographs. I get my misc. screws from George V. since he generally
has them all in stock.

[gregbogantz]

Most of the threads used in Edison machines of 100 years ago are finer than the current sizes. They were standard fine threads back then. Most of them are still available from McMaster-Carr:

http://www.mcmaster.com

[Kevan]

Im sure someone has a replacement that is original