>>2954180
So here is what I have.
The pressure washer pipe is 5/16th thread.
The female air hose adapter is 1/4th pipe thread

Will this work?
https://www.homedepot.com/p/LTWFITTING-5-16-in-OD-Flare-x-1-4-in-FIP-Brass-Adapter-Fitting-5-Pack-HF465405/313890854