Do you have the screw for the Center pivot shoe for a Malta double hung, tilt-in sash window. It fits into part 15-159.
Paul from SWISCO responded:
September 13, 2017
The screw that goes with 15-159 Malta pivot shoes has been discontinued. Since you already have the hole for the screw in the window, you might be able to use the 84-506 screw as a replacement. Think so?