Fluidmaster B1F12CS CLICK SEAL Faucet Connector, Braided Stainless Steel -  3/8-Inch Compression Thread x 1/2-Inch F.I.P. Thread, 12-Inch Length Special nut "clicks" when water tight seal is achieved Stainless steel braiding protects against catastrophic flood damage Fits 3/8 inch Compression Supply Stops 5-Year warranty