Simonton Vent Latches

I have a Simonton double hung 5600 window that needs a couple of new vent latches I figure I will get a few replacements for later of course. The part that I have in me hand looks to be 2" long (including what is left of the part that hold it in) by 1/4 " thick the part that goes in the window with a little thicker trim piece on the outside to cover the gap, by 1/4" thick deep.what part number is going to work?