https://www.acehardware.com/departments/plumbing/pipe-fittings/pex-fittings/4882106
SharkBite Quick Connect Push to Connect 1/2 in. CTS X 3/8 in. D NPT Male Connector Mfr# 25627 - Ace...
Push connect fittings male connector cts x male 3/8 inches x 1/2 Works with copper, CPVC, PEX, LPDE, MPDE, HDPE and polybutylene tubing in hot and cold water...