RS PRO Miniature Push Button Switch, Momentary, Panel Mount, 13.6mm Cutout, SPST, 250 V ac @ 200 mA, 50 V dc @ 200 mA,

These pushbutton switches have been designed to be suitable for use within a wide range of applications and environments with a temperature range of -30 to +85 °C and are IP7 rated (upper side). They are single pole, single throw with an off-momentary switching action. They are panel mount and each unit is supplied with an M12 nut, locking washer and a splash proof O-ring.

Electrical Life: 500,000 make-and-break cycles at full load
Mechanical life: 1,000,000 cycles min (without load)
Operating force: 2N-5N max
Sealed to IP67 (upper side)
Contact terminals: Gold over silver plated
Panel cut out: 13.6mm
Round button