ISO 493:1975

Aircraft — Dimensions for single-hole mounting (Class 1 and Class 2) lever-operated manual switches

Gives the overall dimensions for switches having the characteristics specified in ISO 1466. The overall dimensions shall be accordance with those shown in figure 1 and the table, which are suitable for accomodating either terminal screws or integrated terminal on the face opposite the mounting bush. The holes in the mounting panel shall be as shown in figure 1a).