NKK M, P, S, & WT Series Toggle Switches work with below boots.
Black Silicone Rubber Splashproof Boot Assembly, M12x1 Full Boot 14.8mm Height
Black Nitrile Butadiene Rubber for Oil Resistance, M12x1 Half Boot IP65 - Dust Tight, Oil and Water Resistant 10mm Height
Black Silicone Rubber for Flexibility, Resilience, and Tensile Strength over Wide Temperature Range, M12x1 Half Boot Environment Sealed 10mm Height
Gray Ethylene Propylene Rubber for Dust & Ozone Resistance, M12x1 Half Boot Dust Proof 10mm Height
Boot seats over supplied Hex Nut. Hex Nut tightens O-ring against Panel. Click Here for replacement 12.1mm O-ring AT401P (360-1719-ND).
Click here for all DigiKey Toggle Switches
Click here for all DigiKey Accessories - Boots, Seals
Click here for Source Reference Datasheet (p.7/33; Y8) (p. 32/33; Y33)