A contractor from Cape Neddick, Maine says:
August 17, 2014
I am looking for a pivot shoe that looks like your 15-208, has the same dimensions and has a rear brake pad but accepts a 26-068 pivot bar. The shoe is for a sliding window so it is in the head and sill of the frame and has no springs attached. It's sole purpose is to lock the window in place when you tilt the window to wash. I am wondering if the 15-046 would work. It is the same width & height and the length doesn't matter as there is nothing but dead space under the length of the sash.
Dave from SWISCO responded:
August 18, 2014
I don't think the 15-046 will work for you. The 15-208 and 15-046 have different dimensions entirely. You have a very peculiar set up on your sliding window. It sounds like a double hung window turned on its side to act as a horizontal slider. Looking at your photo, your sample does look like the 15-208, but are you sure yours is only 1/2"? Could I maybe see a few pictures of this shoe installed?