This specification covers subminiature audio helical retractile cords and straight cords with either stranded wire or tinsel wire conductors, for accessories associated in for the use with microphone,telephone, switchboard, and associated communication equipment. These cords are intended for operations at audio frequencies and temperatures from -55 °C to +85 °C with a high degree of flexibility. Each retractile cord is designed for extension in normal service up to 6 times its nominal retracted helical length.