Blank

[Rusty]

Blank

[pat king]

3 X .6 JIS  They are not the ISO standard M3 X .5 screws.
Pat

[pat king]

M3 X .6 screws are almost impossible to find here in the USA, I think they are getting scarce in Japan. You can re-tap the clamp to M3.5 X .6 . Those are ISO standard and available here, or the easiest is to re-tap 6-32 and use readily available 6-32 screws. #6 screws and M3.5 screws are the virtually the same OD (.0002" difference).
Pat

[Steve Thomas]

Have you tried just emailing Enya?

[Dallas Hanna]

Short length (12mm) still available from Micro Fasteners.

https://www.microfasteners.com/scm3012p6-m3-x-0.6-x-12mm-socket-head-cap-screws-metric-alloy.html

If you need any longer you could sacrifice a 50mm long screw by cutting off the 0.5 pitch thread length and then thread the remaining shank with 0.6 pitch

HH