Optical fiber adapter for connecting single-mode optical fibers with SC/APC connectors. The high-quality ceramic pin high quality, beveled at 8 degrees, reduces back reflection attenuation. Locking mechanisms facilitate installation and removal. The Simplex cable type is used in cable channels, distribution panels, and conduits with low mechanical loads. Single-mode optical fibers transmit light in only one mode, with low reflection and reduced dispersion. SC connectors provide fast and easy connection, secure attachment, and resistance to connection failures. They are used in telecommunications, video devices and media converters, LAN, WAN, and CATV networks, sensor systems, measurement applications, and railway networks.