Mid 70's metal bifold closet doors. lower track guide plastic piece

A quick learner from Saint Paul says:

November 7, 2017

I have been looking for a replacement plastic knob that fits on the end of the metal pin into the floor track of these metal bifold doors. It is actually the white piece in the pictures. I need one of those for a different closet door that is of the same style and make.
I could not find any markings on the doors, but know the building was built around mid 1970's. Anyone know where to find this. Have searched local Big box and small hardware stores.

Paul from SWISCO responded:

November 13, 2017

I believe we can help you with this. I think the cap you have been looking for is our 21-106. The pins you currently have are usually filed down on the end to accept these caps. Let us know if you can make this part work for you.

A quick learner from West Bend, WI says:

June 13, 2023

There is a piece that fits in the track that the rod fits in.. can't find.. it goes with product code 21-054? can you help me??

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Tom from SWISCO responded:

June 13, 2023

The cap you show here appears to match our 21-108. I believe this is what you want but look it over and see if you agree.

Detail of 21-108

Bifold Pin Cap, 3/16" ID

21-106

$0.85

Bifold Door Top Pivot and Guide Pin, Leigh

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