Flair-It
3/8 pex x 1/2 fpt swv bsp, swivel coupling, for pex or polybutylene, use to connect to a faucet or any 1/2" mpt, bsp means it will also work on a faucet that has parallel threads which are sometimes used in manufactured homes & rv's.
Apollo Press Caps
Apollo Press Couplings & Unions 3/4 in. Copper Press Coupling with Stop -20 Pack Jar
Anderson Metals 1/2 In. Brass Compression Cap
Eastman Gas Range Installation Kit
Watts PVC Air Hose