Parts needed to repair many awning windows

Question

Hello!
These windows are original to this house built ~1969 in Sarasota FL (Gulf Gate community). I can't find any indentifying labels on these windows.
I had a (now retired, boo!) old-time FL window guy who came in some years ago who had the parts we needed (in the first photo, it's the black part, that was a replacement). But in nearly all of my windows, (photo # 2, etc) this part is off white and crumbling. In some cases it's broken off from the window entirely. It measures around 2 3/4 x 1.5 inches.
Can you help me indentify this part and/or this brand of windows? A little digging on your site has revealed part 39-539, which looks very similar to what I need, but I'd love to have that verified!
Thank you so much!!

Jasmine · Accepted Answer

Thanks for posting! The awning window part you have pictured in the first photo does appear to be the 39-539 Anderson Vent Hinge Pair.

The part in the rest of the photos reminds me of the 39-537 Lock Assembly Pair. The white plastic piece is sold separately, it is the 39-538 Nylon Cam Lock Pair.

To determine which of these are the replacements you need, be sure to carefully review and compare the dimensions.

Alternate image for 39-537

Alternate image for 39-538

Alternate image for 39-539