My contractor installed a 3/4" gas line to the exterior of my house, and capped it off, as I didn't know what type of grill I would be purchasing and what connection it would expect. The Weber grill I purchased expects a 3/8" male pipe thread (MIP) to its quick-connect hose.
I went to the hardware store and the helpful person there sold me the pictured series of adapters, but cautioned me against actually using it due to the fact that it's too many adapters chained together. Ideally, I can just find a shutoff valve that has a 3/4" FIP input for my gas line and has a 3/8" MIP output, and I don't need any additional adapters, but digging around on the internet, such a thing doesn't seem to exist. If I need to purchase parts, what's the fewest number possible, and what material should they be? (Brass, I assume, but maybe others are acceptable for outdoor use?)
It's worth noting that there is another similar question, but it doesn't have an accepted answer, and the highest-voted answer seems to actually be the wrong type of adapter