7452571 - 

RS Indicators and Illuminated Push Button Switches - SD16 Series (16mm)
Momentary and alternate action, square and rectangular, illuminated or non illuminated SD16 series Push Button Switches and matching Pilot Light Indicators to fit industry standard 16mm diameter cut-outs in panels with a thickness between 0.5 and 5mm. The single pole SD16 Push Button Switches and Pilot Light Indicators are pre-fitted with a contact or lamp block, for illumination use a T1 3⁄4 (MG5.7s) midget groove filament lamp or LED and then select a suitable a lens.
Suitable lenses for use with the SD16 series of Push Button Switches and Pilot Light Indicators are provided in a choice of colors (blue, green, amber, red and white) and shapes (square and rectangular). Each lens has a flat profile and is manufactured from Polycarbonate which can be engraved.