CML 17-020.35x M6 (Ø6mm) LED panel mount 3mm LED Indicator with prominent (exterior) metal bezel and resistor, voltage 24Vdc, degree of protection IP67 (front).
Grayhill 87CC3-201, Insertable legend button with PCB mounting, Snap Dome contact,
Standard insertable legend modules are an economical way to create your own keyboard legend. Just remove the clear button cap, add any legend, and replace the snap-on cap.