2 pieces of genuine Omni Spectra (Spectra, Inc., Farmington, Michigan) OSM® 208A bulkhead feedthrough connectors. These are jack-to-jack (female-to-female) hermetic seal designs, ideal for RF/microwave applications requiring reliable panel/bulkhead penetration while maintaining environmental sealing.

• Model: OSM 208A (OSM series is Omni Spectra's original designation for high-quality SMA-compatible 3mm semi-precision connectors).
• Configuration: Bulkhead feedthrough, jack/jack (SMA female both sides), hermetic seal.
• Includes per package (where intact): Connector assembly, mounting nut, lock washer, gasket.
• Material/Finish: Gold-plated contacts and hardware (excellent for low-loss, corrosion resistance, Mil-Spec quality).
• Condition: All pieces are unused New Old Stock (NOS). Some outer packaging is damaged or opened (as shown in photos), but contents are complete.
• Applications: Microwave/RF systems, test equipment, antennas, aerospace/military surplus, ham radio, instrumentation panels, hermetic enclosures. DC–18 GHz typical for OSM/SMA series.
• Packaging: Original sealed or partially opened Omni Spectra plastic pouches with labels (see photos).
• Mil-Spec / High Reliability – Vintage military/aerospace grade components.