Flair-It 16870 Tube to Pipe Adapter, 3/8 x 1/2 in, PEX x MPT, Polyoxymethylene, White

Flair-It fittings are constructed of durable polyoxymethylene (POM) and are compatible with PEX and PB. The patented design consists of a nut and flared insert and requires no tools. The fittings push against the ID and OD of the pipe, creating a strong long-term seal.