Eaton Weatherhead 1868X4X4 Brass CA360 D.O.T. Air Brake Tube Fitting, Male Connector, 1/4" NPT Male x 1/4" Tube OD Connects 1/4" NPT male fitting to 1/4" OD nylon tubing Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability No hose clamps or ferrules are needed 150 psi maximum working pressure Meets D.O.T. FMVSS 571.106 air brake specifications