Siemens 3SU1 Series Twist Release Illuminated Emergency Stop Push Button, Panel Mount, 22mm Cutout

Siemens extremely rugged IP69K 22 mm e-stop mushroom push button heads in high-grade plastic.
Available in a variety of colours and reset methods.

Self-holding function of the actuator when mounting
Twist prevention integrated into patented holder design
Stackable contact modules
Suitable for use in extreme environments
No special tools required
Simple geometry for mounting holes