SHRG48P9ESH7 instrument plug without a shell.
SHRG48P9ESH7 is a cylindrical low-frequency space-wired sealed connector with threaded coupling to secure the mated position.
It is used for connecting and disconnecting electrical circuits (wires, cables, assemblies and units) in various types of electrical and radio equipment.
Manufactured for indoor mounting in NF climatic version according to GOST RV 20.39.414.1.