Do you know the difference between Senior(SR) and Junior(JR) LC Unicam connectors?

The difference between a SR and JR UniCam LC Connector is that JR does not have a ferrule with a spring. In other words, you can’t push on the ferrule to make it retract into the connector housing. The old LC Junior part number is 95-XXX-98 and the new LC Senior will be 95-XXX-99. Refer to the UniCam Pretium™-Performance Multimode Connectors, LC, SC, ST® Compatible specification sheet for more information.