Adapters with Male threads and a Flair-It connection. 3/8" and 1/2" fittings will fit PEX or polybutylene tubing. 3/4" fittings will fit PEX tubing only, to use on polybutylene see Related Items.
2pk 1/2 Faucet Nut
3/4x3/4x3/4 Tee Sharkbite