Here is what I just ordered:
6537K75 Hose Couplings Without Shut-Off Valves Brass Sleeve-Lck Socket, 1/2" NPTF Fem, 1/2" Cplg Sz - $9.33
6537K13 Hose Couplings Without Shut-Off Valves Brass Plug, 1/2" NPTF Female, 1/2" Coupling - $4.62
6537K93 Hose Couplings Without Shut-Off Valves...