“Tribus Innovations introduces you to the worlds finest 360° ratcheting flare nut wrench. The patent pending design (15/092,056) offers a 4° ratchet pitch and 360° rotation.

Rivet nuts comes in a wide variety of sizes and threads for practically any project. The nuts themselves are so cheap that you could get 100 of them for about $5.But if you want an installation ...

13mm wrenchor socket for steering shaft U-joint. 16mm and 18mm flare-nut wrenches (or open ended wrenches or even Vise Grips if you don't care about mangling the hose fittings).