FC fiber optic connector with 2. 5mm zirconia ceramic ferrule and screw-type threaded coupling mechanism. Designed for precision test equipment, single mode networks, and high-vibration environments. Available in UPC and APC polish types. connectors also feature an internal cavity and epoxy injection tube eliminates the possibility of. The FC connector delivers stable, low-loss fiber connections using threaded coupling and Diamond's Active Core Alignment - ideal for telecom, industrial, and high-performance optical systems.