bifold door parts

A quick learner from Rochester nu says:
Need pins to hold door on track
A customer submitted photo of a bifold door pin.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting. We are currently researching possible replacements for that top pin of yours. In the meantime, however, I would like you to take a look a few parts and compare their measurements to your existing hardware. Please look at our 21-018 Bifold Fenestra Top pivot and our 21-019 Fenestra Bifold Bottom Pivot, as well as our 21-161 E-ring and 21-256 cone spring. Do you think these would match your current pins? Please let us know!
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21-016 : Bifold Door Top Pivot, Fenestra
21-016
Price: $4.95
Bifold Door Top Pivot, Fenestra
21-018 : Bifold Door Top Pivot, Fenestra
21-018
Price: $5.25
Bifold Door Top Pivot, Fenestra
21-019 : Bifold Door Bottom Pivot, Fenestra
21-019
Price: $5.25
Bifold Door Bottom Pivot, Fenestra
21-161 : 5/16
21-161
Price: $0.30
5/16" E-Ring
21-256 : Cone Spring
21-256
Price: $0.95
Cone Spring