Screw sizes for removable blade framebacks.
Yesterday PS. Have appointment with clockmaker for Friday! Watch?? this space.
Well, the clock maker checked the screw sizes. against his screw cutting dies. (Jewelers' screw plate)
The answer was that most were / are Metric 2.5mm diameter x 0.5 thread. With a socket head they are at your local hobby shop.
And...some are 2.5mm diameter by 0.45mm threading. They are available on line and mostly from sources on the 'bay in packs of 50 or 100 or so for cheap price.
And all were about 5-6mm long.
I used: (Screw, 2.5mm 0.45mm) for a search on the "Bay
~Richard
PS. Cheese head would be the closest to historical usage. ( My guess was many have been replaced over the years )
Attachment 143782
Have fun!
PPS. I just ordered a pack of the 2.5'x 0.45 pitch. Will send out some if needed. PM me if so. Will have by the end of the month. Nov.1 or so