Plantation shutters were installed in all windows and the crank can not do a full rotation which means windows cannot open or close. Need to find a new type of crank for these Anderson windows. Thinking of T-cranks or possibly telescope crank. The spline is 3/8.
Bob from SWISCO responded:
March 19, 2020
See our 39-298 Tee Type Crank. This is for Andersen operators and indeed accepts a 3/8" Spline. Look it over and let me know what you think.