8-15 x 1/2" Truss Head SS Phillips Screw

In the photo, the very bottom of the plastic piece cracked. Looking to replace this piece

Not sure what these are or of there are replacements for them. Just trying to find out if there are window balances for them.

Can you please help me identify and replace all needed parts for my window with broken coil springs on both sides. The vinyl windows are quite old and I haven't been unable to identify any brand/model markings on the window frame itself or on any of the hardware. Thank you for your time and any as ... (cont.)

Hello, I am looking to replace the coil balance assemblies for a window. shoe width ; 1.25 shoe depth ; .5 coil spring thickness ; .5 8lb spring rating. There appear to be two coils in the assembly, but I am unsure if this is a single coil that snapped or if I must replace both. Thank you in ... (cont.)