This is meant to zip tie onto your tire pump or filler hose so that you can temporarily store the valve stem cap there and eliminate lost caps.
This may need the bottom custom radiused to sit well on your hose or pump. Just use the tinkercad file and set the proper diameter for the cylindrical hole and make sure it is a few millimeters into the bottom 90deg to the zip tie slot. Alternately hit the finished object with a round file and make your print easier.
This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/9XNBZwokV8r
0.02mmLH x 0.4mmN With Layer Adaption
48m with the Layer Adapt on and the threads are perfect which is what matters.
Mine had support for the radius I cut in the bottom to match my tire filler diameter.