The AHX662-A is a replacement key accessory designed for use with Fuji Electric selector switches and pushbuttons, specifically compatible with models AH164-J, SJ, JK, SJK and AH165-J, SJ, JK, SJK, JM, RJM. This key is part of the AHX662 series, which includes multiple code type variants (A, B, C, D, E, F) to accommodate different switch configurations and locking mechanisms. The key washer (Type AHX2601) features a mounting hole of 17.9 mm (1/2") with a maximum radius of 0.8 mm and an outer diameter of ø16.2 mm (3/4"), providing secure and precise positioning. These keys are essential replacement components for maintaining proper operation and security of industrial control panels and operator interfaces.