These parts are for storm windows. I don't know how old the windows are, but probably at least 20 years or so.
Lauren from SWISCO responded:
June 29, 2023
Hello, thank you for posting,
Please start by reviewing the style of the 91-054 nylon slide bolt pair along with the 91-003 spring. Compare the overall style and dimensions to confirm a good fit! Let us know what you think and if you have any additional questions.
A home owner from Indiana says:
June 29, 2023
Those appear to be what I need. Thanks very much.
Lauren from SWISCO responded:
June 29, 2023
No problem! Please let us know if you have any future hardware questions.