721X322 Pretium 95-200-51 UniCam ST Connector, Single Mode OS2. The Corning Pretium 95-200-51 UniCam® High-Performance Connector is a ceramic ferrule single mode ST connector designed as a fast and easy field-termination solution. Each single mode ST fiber connector pair guarantees a 0.2dB typical/0.5dB maximum insertion loss with ≤ -55dB reflectance. This no-epoxy, no-polish ST fiber connector is FOCIS compliant with TIA/EIA 604-2 and IEC61754-2. It can be installed in about 50 seconds with the UniCam Connector High-Performance Installation Tool Kit TKT-UNICAM-PFC (sold separately). The operating temperature is from -40°F to 167°F which exceeds EIA/TIA 568-B.3 standards. This field-installable Corning UniCam ST connector has an amber housing and blue boot.