A quick learner from Clinton Township, Michigan says:
June 26, 2016
I have an old bifold I need hardware for. I would need enough hardware for 2 bifold doors both top and bottom hardware.
Tom from SWISCO responded:
June 28, 2016
Thank you for posting, I would consider the bottom threaded door pin, this would be our 21-001 and the other bifold spring loaded guide pins would be 21-007. Take a look and see if these would be a good fit for you.