1/4 28 bolt with bushing for awning window

The only two shoulder bolts we carry are the 33-067 and 33-070. I don't believe they match the thread count you need.

See if you can find the name of the manufacturer somewhere on the window. You might need to contact them to get this special bolt.

You could also get a screw from a local hardware store that matches the thread count and size you need, and use some kind of nylon tube or straw to create a makeshift shoulder. I have done that in the past. See what you can manage. Sorry that we can't assist further.