Pivot bar

Hi~ I have a piece of a pivot bar I found when I moved into my house. It turned out that one window is missing the bar on each end of it so I cannot open the window without it falling completely out. The small center in the round part of the head is 1/4" x 1/8". The round part of the head is 3/8". The bar is 1/4" wide but since part if it is broken off and I don't have it, I don't know how long it its. There is a circle with a 3 in it. Last year I purchased a Tilt Window Latch, Right Hand
26-244 for is same window if this helps at all. Thank you

Hi~ Thank you so much for your help. I see now that I also need the part that this pivot pin goes into where they come out of the window on each side so the window will tilt and stay in. I'm not sure of the name of the area the missing part goes into. I looked online and found a few names. Interior stop, channel and parting stop but I'm not sure if these are correct. I did attach a picture. Thank you

Hi~ Sorry, I'm not feeling very well. I just now thought of taking a picture of the other window that has all of the parts to it. I believe it's the Coil Balance Shoe that I need. Two different Coil Balance Shoes up on here with the pivot pin that I need and I don't know which one to order. Thank you