Slimfold door pins

A quick learner from USA says:

older Slimfold door. Bottom pin is just a pin and there is a clamp piece to hold it in place. I have a number of pins, but none have the screw slots at the top, so I need to replace these. Could it be the 21-001 even though it seems to have more parts to it? Need top and bottom replacements

maybe lower pin in 21-001 and what I thought was a compressed spring is actually threads

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Paul from SWISCO responded:

For your old Slimfold door, I believe you can go with the 21-001 bottom threaded pivot pin. For the other pins with springs, our 21-055 would be a good match. 

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