Crank mechanism

A quick learner from US says:
The crank mechanism on the window won’t close the window. It appears the threads in the housing are stripped. See photo. What is the solution? Thanks
window crank
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Tom from SWISCO responded:
Stripped threads mean you need a new operator. You might be able to replace yours with our 39-015, depending on the size. Are our measurements the same as yours?
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