Image of pin only?

A quick learner from New York says:
August 7, 2017
I have a US Plywood metal bifold door and I need replacement pin caps. The pin is 5/16" in diameter and therefore requires a cap with a 5/16" inner diameter.

Do you have any images of the pin without the cap, or the underside of the cap? Is this pin entirely 5/16", or is it a smaller diameter under the cap?

It would seem that the cap (21-106) is what I need, but I can't find any info on the inner diameter.
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Paul from SWISCO responded:
August 10, 2017
I'm afraid the 21-106 won't accept a 5/16" pin. It accepts a ground down pin end at 3/16". If you need a 5/16" pin with a 3/8" outer diameter cap, consider our 21-005. I'm afraid they don't make nylon caps with a 5/16" inside diameter.
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