Fenstra Bifold Door

Handy Person from Ann Arbor, MI

Nov 14, 2025 2:08 pm

Moved into a house with 4 sets of Fenstra bifold doors from the 60s or 70s. A number of the parts appear to be replaced a bit haphazardly.
I believe I need part 21-019 for the bottoms, but I also need the bracket to secure them. Wanted to confirm.
I've attached a photo of a top pivot pin that recently broke. Seems similar to 21-018, but the pin is 4" long and I don't see evidence of the knob at the top. It could have beeen the wrong part to use to begin with. It wasn't secured at all, so as soon as the nylon broke and the track wasn't holding it up, the whole thing came tumbling down.
Could you be so kind as to generate a list of all the part numbers I'd need to get these reinstalled correctly? I can then use that as my shopping list with you.
I also assume that I need to take the doors out to install these pins correctly. I think the previous owner didn't do that, which is what is contributing to parts literally falling out.

4 user uploaded images

10 Replies

Lauren from SWISCO

Nov 19, 2025 2:49 pm

Hello, thank you for posting,

I am going to have one of our senior experts take a further look at your doors to determine compatible hardware. We will be in contact as soon as more information is available. Thank you for your patience!

Paul from SWISCO

Nov 20, 2025 1:54 pm

Hello,

For the guide pins, you can use the 21-018 with the 21-256 spring and locking push nut, 21-156. For the bottom threaded adjusting pin, we have 21-019, but you will need a bracket with screw to use in the door. The pin is worthless without it in this case.

We do not currently carry this bracket, but have researched and bringing it into our inventory. I will be back in contact as soon as it comes into stock for your review. Thank you for your patience!

Handy Person from Ann Arbor, MI

Nov 20, 2025 2:32 pm

Thanks, that is very helpful!
I'm curious if the push nut is supposed to supposed to go into the groove near the end of the top pivot (21-018). Seems like the the whole thing would still fall out, as that groove will be below the steel holder. But hey, I'm a handy person and I bet I can figure it out.
Any reason a nut cannot be used with 21-019? Not clear why it's threaded.
Todd

Paul from SWISCO

Nov 24, 2025 11:55 am

Hello,

You can push the push nut further up the pin, but be careful, you can't bring it down unless you break it off. As for using a nut on the threaded pin, normally many bi-fold companies do use a nut like our 21-002, but Fenestra wants the clevis bracket with locking screw.

We will keep you updated when this part is in stock to view.

Paul from SWISCO

Dec 12, 2025 12:14 pm

Hello,

Please see the new 21-179 Clevis to use along with the 21-019 pivot. Review below and let us know if you have any additional questions!