Adapter between 3/8in Thread and Bike tire 5.5mm thread for HPA filling

This adapter was designed to Connect a foster 3/8in HPA coupler with the fill valve of a bicycle tire, that has 5.5mm diameter. It's a one way valve, doesn't need to be physically pressed to open, that's why the adapter is so simple.

Printed in 95A TPU. Sealed well enough to fill the tires to 50PSI, which is what was recommended. I don't think it will seal properly with much more pressure.