Ruggedized COTS ST Coupler, Multimode and Single Mode, Nickel Plated Brass

The FOA-RSTN-SM ST to ST adapter is a commercial off-the-shelf (COTS) fiber optic adapter designed to provide reliable mating of ST single mode fiber optic connectors. Constructed with a brass body and nickel-plated finish, this adapter offers a practical and economical solution for fiber optic interconnections where durable commercial-grade hardware is required. The adapter features a zirconia alignment sleeve, stainless steel passivated hardware, and a PVC dust cap for protection when not in use.

The FOA-RSTN-SM is suitable for single mode fiber optic patch panels, enclosures, termination boxes, splice systems, and equipment interconnections. Its ST interface provides a secure bayonet-style connection commonly used in telecommunications, industrial, test and measurement, security, and other fiber optic applications. The zirconia sleeve helps maintain accurate connector alignment to support consistent optical performance during repeated mating and unmating.

Designed as a cost-effective COTS alternative to MIL-spec ST adapter products, the FOA-RSTN-SM is well suited for commercial and industrial applications that do not require the qualification or construction associated with military-specific components. Its brass construction and nickel-plated finish provide a balance of durability and economy, making it an option for fiber optic system designers, OEMs, integrators, and maintenance applications requiring an ST/ST single mode adapter.