The 91-PC4F is a 4-way DIN Microphone Connector designed primarily for audio equipment but it is used extensively on all types of portable equipment. This receptacle features positive screw type coupling ring connection and squeeze type clamp cable grips. Chrome-plated brass shell and molded black phenolic dielectric.
Chrome plated machined brass shells with threaded coupling and black phenolic dielectric. Panel receptacle mounting hole 27/32" diameter. Maximum chassis thickness 1/8". Allied Electronics:
connector, circular microphone, female panel receptacle, 4 socket cont, rated 3 amp
Newark:
# COOPER INTERCONNECT 91-PC4F DIN Audio / Video Connector, 4 Contacts, Jack, Panel Mount, Metal Body, 91 Series