Alpinetech 16mm 5/8" Anti-Vandal O-Ring LED 2.8V/1.8V Momentary Stainless Steel Metal Push Button Switch Flat Top Shallow Depth (Green)

Mounting Cut Hole: 16mm (0.63" or about 5/8 inch)
Head Diameter: 18mm
Operation Type: Momentary (Self Return)
Switch Contact: 1NO (Normally Open)
LED Color: Green and Red available
LED Voltage: 2.8V (Resistor for 4.3V is included)
LED Froward Current: 15mA
Head Shape: Flat Top
Max Switch Rating: 3A/36VDC
Terminal Type: Pin
Body Material: Stainless Steel (SS is much more resistant to wear and abrasion)
Button Material: Stainless Steel
Contact Material: Silver Plated Gold
Protection Rating: IP65/IK08
Operation Temperature: -20C - 55C
Panel Thickness: 1 - 6mm
Mechanical Life: 1,000,000 Cycles
Depth behind panel: 20mm

CE, TUV Certified

This switch can be used for circuit control in electromagnetic starter, contactor, relay and other electric circuits.  Also great for DIY,  BOX MODs.