Popular square bodied panel mount push button switch with black cap and alternate operation.
 
 
Specifications:
 
Contact rating : 3A @ 125V AC
Mounting Hole Dia. : 12.5mm max. Panel thickness: 5.0mm
Contact Resistance: 50mΩ Max.
Insulation resistance: 500V DC 100MΩ/minute
Dielectric Strength: 1500V AC 1 minute
Electrical Life: 20,000 make-and-break cycles at full load.