Part Number 6256396000
ABAC A39B Piston air compressor single phase pressure switch 1/4"" Nema 1 Way
These are situated on top of the tank and can fail from time to time resulting in the machine not starting or stopping they are usually the point for turning the compressor on and off.
1 Phase Nema Pressure switch 1/4 x 12 Bar - 1 Way 2 Pole 240 Volt