17/32 x 1"1/4 x 2". I think i was holding it together properly but not my wheelhouse. It would be connected to the 25" series 600 spiral tilt window balance, S600-25. Thanks for helping.
Casey from SWISCO responded:
December 16, 2020
Hello, thank you for writing in. See our 15-015. This appears to match the dimensions you have provided.