FYI, other K frame screw sizes are:
5x44 - side plate
4x48 - upper side plate
6x40 - cylinder stop (pre '62)
3x56 - rear sight leaf (pre '93)
6x48 - ". ". ". (Post '93)
6x44 (?) thumb piece screw
8x32 - strain screw
4mm x 0.7 yoke retention system (post '88)
We could use a reliable source for screws. Go for it!

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