ACME 17-4405 bi-fold door replacement hardware
Hello! The roll guide you show in this photo looks very similar to our 21-174. However, I cannot determine your dimensions from just a photo of a tape measure. I recommend looking over our dimensions just to be 100% sure.
Hello, Nancy! I'm glad to hear it's a match.
In most cases, to install these roll guides you will need to slide them into the track from the end. This will likely require removal of the track ahead of time.
Hello! Perhaps I can help. What you are showing here appears to match our 23-113 bottom door pivot. With a wrench, first loosen the nut then screw in the threaded pivot pin into the housing, then tighten the nut to lock it. That should get it to cooperate for you.