Nylon on locking pin in guiding track

Hello! Looks like you have the old Slimfold door. We carry their newer style that replaces the old bi-fold pins. For the bottom threaded adjusting pin, see our 21-001. For the other three spring loaded guide pins, use our 21-007. We also pulled up a list of other parts that go with the Slimfold doors that you can review on this page.