RJFTV21G - 

Olive Drab Cadmium Shell Finish, -40 to +85°C Operating Temperature, Connector

The RJ Field TV Connector allows use of any RJ45 Ethernet Class D/Cat 5 or 5E connection for 10 Base T, 100 Base TX or 1000 Base T network environments. The metallic plug is connected into a receptacle using a tri-start thread coupling mechanism (MIL-DTL-38999, Series III)
RJ field allows you to use an Ethernet class D / Cat. 5e connection for 10 baseT, 100 baseTX or 1000 baseT networks in harsh environments.