1 Scope and object
2 Normative references
3 Preferred dimensions of shaft ends and bushes
   3.1 Plain round shaft
   3.2 Flatted shaft
   3.3 Slotted shaft
   3.4 Concentric shafts
4 Preferred dimensions for the mounting of single-hole,
   bush mounted shaft-operated electronic components
   4.1 Single-hole bush mounting with antirotation lug (non-turn
        device) on mounting face
   4.2 Single and double flatted bush mounting
   4.3 Single-hole bush mounting with antirotation lug
        (non-turn device) on bush
   4.4 Fixing (or mounting) nuts
   4.5 Washers (flat, spring and internal tooth)
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications