LASCO 19-6181 Thread Adapter for Faucet Connection Push-In Fitting with 1/4-Inch OD Tube and 1/4-Inch Compression Female Thread, Plastic Plastic push in fitting 1/4-inch OD tube x 1/4-inch compression female, 7/16-24 thread Quick connection Good for use on PEX, poly, copper OD tubing Clean tubing, push in by hand