ASM Conversion screw sizes

[reno]

Does anyone out there know the screw sizes of screw in the back of the hammer of the old ASM 1860 Conversion revolvers? Coffenmaker wrote and said he thought they may be 6/32 or maybe smaller. He also said Uberti screws would work in the backstrap and trigger guard. Thank anyone for more info.
NCOWS #810
Reno