No markings whatsoever

A home owner from NJ says:
June 20, 2017
I hope you can help me. I don't even know what these white plastic things are called, but they attach the window to the cords which ultimately attach to long springs in the sash (I believe it's called). Most of the windows in the house wouldn't stay open, they slam shut when unlocked, and I traced it back to these broken pieces. I temporarily used pop can pull tabs as replacements until I can find the right part.
User submitted photos of window hardware.
Profile picture of Tom
Tom from SWISCO responded:
June 22, 2017
Thanks for coming to SWISCO.com! I believe we can help. Take a look at 15-159. Compare the measurements to the measurements of the part you need to replace. Does that look like the right part?
Pivot Shoe, Malta
Pivot Shoe, Malta
15-159
$2.94
Classifying Channel Balance Fittings
Classifying Channel Balance Fittings
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