The Lucent connector, commonly known as the LC connector, is a small form factor type of fiber optic connector used in high-density aerospace applications. Our portfolio includes a connector kit with a 1. 25mm. LANMARK-C541- M12D-PKB M12, D-CODED, 4-PIN SCREW TERM. Extron Quick LC Fiber Optic Connectors are factory pre-polished, field-installable connectors for fast, reliable termination of Extron multimode and singlemode fiber optic cable. 5/125um and Multi-mode 50/125um.