Windows are TRACO Vinyl double hung with Model TR4300 from August 1999.
These hold the top of the bottom window in the track and when you pull them inward, you tilt the window out toward the inside of the house. They are 2 7/8" long, 3/4" wide, and 5/16" deep to the best of my measurement.
it has the following on them 15L Pat Pend 5.139.281
I need 10 for the right side and 10 for the left side
While I am currently in Michigan, the house is in Pittsburgh and we are moving within a month.
Thank you,
Michael