Brass Reusable 1 Wire Braid Reduced Bore Three-Piece Fitting, 7/16-20 Female SAE 45 deg Flare Swivel, -04 Hose, Straight

It matches a -04 hose size and uses a 7/16-20 female SAE 45 degree flare swivel on the end. It’s a straight, three-piece reusable brass fitting in the reduced bore style.

To be sure, take a look at the fluid compatibility document linked in the product details. It should give you a good idea of what this fitting is good to go with.

Sized specifically for -04 hose, and that's a hard fit requirement with reusable fittings like these. The ferrule and stem geometry are built around that hose OD and wall thickness, so trying to run it on a different hose size would either leave you with a loose assembly or one you can't get together at all. Stick with -04 and you'll get the secure, leak-free connection this fitting is built for.