This ST/PC (Straight Tip / Physical Contact) single mode connector has a bayonet-style mount that allows for quick connects and disconnects and features a ceramic ferrule with a pre-radiused tip (20 mm) to minimize back reflections. Mouser offers inventory, pricing, & datasheets for Singlemode ST Connectors Fiber Optic Connectors. Single-mode and multimode connectors come with a 2-3 mm boot, a 900-micron boot, a dust cap, and a crimp ring. The combination of a pre-radiused ceramic ferrule and precision polymer housing provides consistent long-term mechanical and optical performance. Pre-radiused, pre-polished ferrule.