This part is located on the hinge side of tall casement windows. The post mounts on inside of the window frame and projects though a hole in the sash serving to align the sash with the frame and keep it from warping. The part is white plastic, tapered to almost a point and is about 7/16" diameter at its largest cross section.
Thanks for your help in identifying this part,
Ben
Tom from SWISCO responded:
August 14, 2017
Hi, Ben. I'm having trouble picturing this part you're describing. Is there any way you can take a photo and send it in, so I know what you're dealing with?