Short flat pan head screw from top bracket of a bifold door.

A handy person from michigan says:
December 28, 2020
It allows the bracket accept the bifold door.
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Bob from SWISCO responded:
December 29, 2020

Can you tell me the diameter of that cap? Also, is there a brand label on the door? From there we will do our best to help you. Many thanks. 
A handy person from michigan says:
December 31, 2020
The diameteof the screw cap is 11/16".
The only branding I can find, is the word 'Alliance 522N' on the top bracket that receives this screw.
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Casey from SWISCO responded:
December 31, 2020

Take a look at our 23-309 pivot bracket used on Alliance series 500 doors and see how the dimensions compare to yours. Unfortunately, the screw is not available seprately. Thanks for posting! 
A handy person from michigan says:
December 31, 2020
That's it! Thank you!
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