Yes
Remingtons are typically 6-48 TPI.
Perazzi shotgun
Your eye is the rear sight.
No
3x0.5 thread
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 Baikal 628 typically uses a front sight with a thread size of 6x0.75 mm. This is a common metric thread size used in various firearm applications. If you're looking to replace or adjust the front sight, it's advisable to verify the size with the specific model, as variations can occur.
The thread size is: M3.0-.5 The Browning part number for the bead is B1116580
5/40 I believe