The AH165-JM2B22A is an oil-tight selector switch manufactured by Fuji Electric, featuring a key operator with rectangular bezel and 2-position 90-degree maintained operation. This switch provides 2NO+2NC (2 normally open + 2 normally closed) contact configuration with direct opening action, designed for reliable performance in harsh industrial environments. The switch is mounted with a washer and nut assembly, accommodating panel thickness up to 4 mm maximum, and features a compact dimension of 37.5 mm depth and 24 mm width. The AH165 series oil-tight design ensures protection against moisture and contaminants, making it ideal for machine tools, industrial machines, control panels, and distribution panels where durability and safety are critical requirements.