Hi,
I am looking for the small screws that hold the Graflok back onto the Pacemaker 4x5. Some are machine screws, some are wood screws.
Can anyone please tell me the sizes I need to look for, and a viable source?
Thanks!

Three suggestions: 1. Try a hobby shop (model railway supplier). 2. Try Micro-Mark (www.micromark.com), a supplier of small tools and other supplies for hobbyists. 3. A fasteners supplier such as Spaenaur (www.spaenaur.com). The latter have everything you could possibly want, in steel, brass, stainless or plastic, but you will have to buy larger quantities. As for the sizes, they are listed in the repair manuals that you can find on-line.

Depending on which version of the Pacemaker determines the screws used.
Pacemakers from 1947-1954 will have 1 of 3 different backs; top rangefinder versions have the graflok back.
The Graflok on either version the 3 bottom screws - Speed Graphic - self threading #2 -1/2 pan head; Crown - self threading #2 - 3/8 pan head.
The two top screws all versions #2 -3/8 self threading; the screw in the film holder gate #1 - 3/8 flat head wood screw.

I get my screws from https://www.boltdepot.com/

A factory service manual:
http://www.southbristolviews.com/pics/Graphic/manual-pdf/servicemanual.pdf

Thank you very much for your assistance!
That helps me a lot...much appreciated!