Paul from SWISCO responded:
November 18, 2016
I'm afraid I can't think of a bifold pin having two grooves in the middle. May we see a picture of your pins and fittings? That would be a huge help.
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Paul from SWISCO responded:
November 21, 2016
Thanks for the photo! I believe you have the old Peachtree bifold door. The pin thickness for these was 5/16", which would match our 21-071. This has two grooves and comes with the cone spring and E clip. I would double check your measurements just to be sure.
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