40A-45TCAL by Dixon Valve | Tank Car Adapter | 45° Elbow | 4" Adapter x 5" Railroad Tank Car Swivel Thread | AluminumFeatures: Standard 5" Railroad Tank Car thread. Construction: Nitrile Rubber gasket in the threaded end. Unit has a long handle brass swivel nut and a swivel retaining ring. How It Works: To make a connection, simply slide the adapter into the coupler and with normal hand pressure, press the cam levers down. Uncoupling is as quick and simple as coupling. Just lift the cam arms and remove the adapter. Safety Notes: Under no circumstances should cam and