wing latch snap in marked 8590
Thanks for posting. This code shows up on a few different tilt latches with winged tops, and so without photos or dimensions of what you have I can't narrow this down further. The 26-408 pair is one possibility. Review the dimensions below and see if this matches up.
If those dimensions don't match, you might have the 26-266 instead. Review below.
Unfortunately, the opposite-handed counterpart for the 26-266 is no longer available. If this is what you have, we recommend you see if you can use the 26-393A pair as a substitute. Though it lacks the winged top, the dimensions our otherwise similar, and so this is the best substitute we can offer at this time.
All prices are listed on respective shop pages. Let us know if you have further questions.