Fuel Pump Bleed/Vent Screw BPF1B & PF1B Pumps 7019-116A
Bleed screw or air vent screw suitable for CAV, Bryce, Bosch & Pyrox BPF1B & PF1B type fuel injector pumps, found on many vintage stationary engines including the Lister CS and many others. Item number 11 in sectional diagram image.