Use the drop down box to pick the screw you need. These are for Remington Barrels with rifle sights and some Remington rifles.
Elevations screw goes in to the side of the slide and is loosened to move the slide up and down the ramp for elevation.
Windage screw secures the rear aperture to the slide. Each retails for $4.37 on the Remington site.
I know $4.25 for that little screw. So don't loose this one, so once you have your gun sighted in, Look where the Rear sight wing is and then take the screw out. Put a very, very, very small drop of Blue Loc-tite on the screw and just snug it down. Do not over tighten as you can snap the head off. Do the same with the Elevation screw by using the scale on the rear sight base. Let it dry and they will be there till you take them off, and because you used blue Loc-tite they will come off just fine.