Schneider Electric, Harmony, ZB4BS8447, Red Ø40 Emergency stop,switching off head Ø22 trigger and latching turn release

Amazon

Progress with confidence designed for industry Flexibility and a robust construction An ingenious locking system consisting of a snap-fit head and body, tightened with a single screw, ensures easy yet secure mounting

Radwell UK

PUSHBUTTON, EMERGENCY STOP, MUSHROOM, 22 MM DIAMETER, TURN TO RELEASE, TRIGGER ACTION, TURN TO RELEASE, RED, BLACK METAL, UNMARKED, IP66/69