Request replacement parts for white plastic corner window Sash Cam

Question

Hi. Just bought a house with old aluminum frame single pane glass dual hung windows and trying to repair them.  On 2 of the windows the upper right white plastic corner window Sash Cam is broken.  See pictures of another window with the white sash cam (not broken).  If you could tell me what the correct replacement part is that would be great.  I don't know who the window manufacturer is or even how old the windows are.  I would guess they are likely 40+ years old?  Thank you, Kevin

Bob · Accepted Answer

Thanks for writing in. Based off appearance alone, our 18-052 Top Sash Guide comes to mind. Review the diagrams below, compare to your undamaged guide, and let me know if anything differs, and if so, by how much.

Alternate view of 18-052