On my sliding patio screen door there is an height adjuster held in place by flat-profile screw inserts. I'd like to obtain more of these threaded bolts and inserts, but I have a nomenclature issue where I can't identify them precisely.
The bottom and top rails of the frame allow sliding up and down to adjust the overall height of the door. The height setting is locked with a phillips-head bolt and screwed insert which looks like a rivet. this is the back view.
What type of screw is that?
It looks like the insert for a rivet nut (rivnut), but the lip is larger. I could assemble something like it with rivnuts, but I'd need to buy the corresponding crimping tool.
It could be a Chicago screw post (used to bind leather pieces or photo album books), but I've not been able to find any Chicago screw posts that are of matching dimensions and material (I'd need M4-9mm screw with 10mm insert). If there is a generic name that captures both rivnuts and chicago posts, I don't know it.
Any fastener which is slim would probably work (the frame needs to be as thin as possible to slide freely around the glass panel frame). I'll probably just end up using a slim nut and bolt cut to length if I can't find out what it is.
Best Answer
They are most often called a "binding post", at least that is what the fastener suppliers in the U.S. generally sell them as. I have heard people call them "Chicago nuts" but not often.
As a side note, those adjustable sliding screen doors are difficult to make work properly and of poor quality. Do yourself a favor and get a custom made heavy duty door, with a frame made of extruded aluminum. They are worth the investment over the long haul, provided they are sized correctly and installed and maintained properly. At least that has been my experience.