Crank handles for Series 700 casement windows
We carry a ton of handles, but I'm not exactly sure what to recommend for you. It would depend on the diameter of the hole. Can you tell me what that is?
11/32" is a common diameter. If yours is the same then I recommend our 39-205. If your diameter is anything else, though, let me know and we can try to find something else.
The only 5/16" handle we carry is the 39-274. This is explicitly designed to be used with older style operators like our 39-020, though. I don't think this is what you have.
I would triple check your hole measurement. Make sure to be as precise as possible. I know 1/32" difference doesn't seem like a lot, but it really does matter.