Special Features:

Engraved pushbutton reads 0; housing marked with keying number; major components: engraved pushbutton 1, dripproof seal 1, red filter 2, white filter 2, rfi/emi shield 1

Properties:

Two or more different types of items having a common mounting or mounted on each other which together forms a portion of a switch but which in itself is not a complete functioning item and cannot be assigned a more definite item name. See also switch section, rotary and contact assembly, electrical.