Fuel Pump Su AUA66 Low Pressure Dual Polarity Front/Bulkhead Mounting 12 Volt with minimum flow of 8 gallons per hour. Points Type Singe Pump Fitting are : 1/4" BSP Male for Inlet 1/4" OD Male for tube fitting - Outlet Notes: The thread in the pump back for fixing to the bulk head is 1/4" BSF