scope:

This specification covers requirements for three retractile cords designated as follows:

Cordage WD-9/U (2 conductor) Cordage WT-2/U (3 conductor) Cordage WF-4/U (4 conductor)

The cords covered by this specification are designed for use on communications equipment at audio frequencies, at temperatures from minus 40 degree Centigrade to plus 60 degrees Centigrade for continuous operation. It consists of two, three, or four cadmium-copper-alloy stranded conductors insulated with a natural rubber compound encased in a Buna S or Buna S and natural rubber compound jacket which is vulcanized in a helical spring coil form to produce a cord which will extend and retract freely. It is designed for extension in normal service up to five times its nominal retracted length.

intended Use:

Used on communication equipment at audio frequencies.