Smith & Wesson Revolver Rear Adjustable Sight Made Before 1992
S&W screw size for mounting (forward screw) the older square front (made before 1992) is 3/56” USA Guns And Gear Part #: 03735000
S&W screw size for mounting (forward screw) the older square front (made before 1992) is 3/56” USA Guns And Gear Part #: 03735000