DT-2R711-A7
Micro Switch DT-2R711-A7 Honeywell Switch DT2R711A7 (Pack of 3)
You will find that MicroLubrol works well with a needle applicator for precision.
Microswitch DT-2R711-A7 Honeywell Switch DT2R711A7
This thing is built with hardened steel, so you can count on it in rough conditions.