Panel cutout/drilling: 19mm. Lifespan: electronics--50000 cycles. Lenght: 39mm. Switch mode: normally closed contact (push-OFF). Switch type: Key switch. Outer material: Stainless steel. Number of Contact: 1. RoHS: yes. Number of stable positions: 1. Electrical insulation: IP40. Max load: 24VDC/1A, 250VAC/0.5A. Article family: switch. Operating temperature: -20...+55°C. Spec info: key can only be removed from 1 position