Searching for 31877 crank attachment

Question

looking for a replacement bracket that attaches the crank extension arm to the window. It is a small plastic piece that slides into a channel on the bottom of the window and the crank arm snaps into it to allow opening and closing of the window. window model is C-LC50 940x1956 (37x77.
Picture is below.

Jasmine · Accepted Answer

Thanks for posting! The part you are searching for is the 39-529 Truth Hardware track slider. This is typically used for our 39-253RB and 39-253LB casement operators. Look over the dimensions to confirm that this is the part you are searching for.

Alternate image for 39-529