HANSEN 42 Coupler Plug, (M)NPT, 3/8, Steel. More details: Quick Coupler Plug, Universal Interchange Type, Locking Type Sleeve, Steel, Zinc Plated Finish, Pipe Size 3/8 In., (M)NPT Hose Connection, Body Size 3/8 In., Max. Flow 45 cfm, Max. Pressure 1000 psi, Temp. Range -40 Degrees to 250 Degrees F