FS 825/903 - 40-Way Connector Backshell Halving
The FS 825/903 backshell halving (Drawing: 872 - 20/3) is a standardized protection and shielding accessory.
It is designed to snap together securely to form the complete outer protective housing (full backshell)
for 40-way multipolar lineside connectors used in signaling environments.