replacement parts for 80" bifold metal doors

Thanks for posting. I'm afraid we need a little more information to go off to be able to help you. Do you know the manufacturer of the bifold door? There may be a label somewhere inside the door that indicates this. Can you show us pictures of the bifold pin and provide us the diameter of the pin and the cap? We'll see what we can narrow down from there. Many thanks. In the time being, you can see our assortment of metal bifold door hardware here.