Yes
Remingtons are typically 6-48 TPI.
Perazzi shotgun
Your eye is the rear sight.
3x0.5 thread
No
It is a sight for a Remington model 12 pump .22 If you have one I will buy it.
I have an original 16 ga. nitro special made by Lefever. The sight bead is one eighth if an inch in diameter.
bead
6X48
The thread size is: M3.0-.5 The Browning part number for the bead is B1116580
5/40 I believe
line up the target on the top of the front sight while sighting the front sight through the rear peep sight.