BS 4185-1:1967

This standard relates to separate millimetre and inch series of locknuts, “C” type, socket set screw locking, for use on machine tools and their auxiliary equipment.

NOTE “C” type locknuts are those for use with a hook spanner²⁾ (“C” spanner).

The millimetre series is suitable for threaded components of diameter 10–125 mm and the inch series for threaded components of diameter ½–5 in.

NOTE All the millimetre dimensions in this specification relate to the millimetre series and all the inch dimensions to the inch series.

Materials, dimensions and tolerances, finish, designation and marking of separate millimetre and inch series, the millimetre series suitable for threaded components of diameter 10 mm to 125 mm, the inch series for those of diameter ½ in to 5 in.