Beer Line Cleaning Kit (adapter)

I have created a new design, based roughly on an earlier design by @Grooviee that had the wrong threads (at least for sprayers in the US).
I've changed the thread size so that it uses NPT 18 TPI and fits all of the common hand pump sprayers you find in the US (Home Depot, Menards, WalMart, etc).

Here are the makings for a very inexpensive beer line cleaning kit:

Sprayer: https://www.homedepot.com/p/HDX-56-oz-Handheld-Sprayer-0-4375-Gal-56HDX/312367618?MERCH=REC-_-rv_search_plp_rr-_-NA-_-312367618-_-N
Keg Post: https://smile.amazon.com/gp/product/B0714D1JTT/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1