FC Simplex Metal Fiber Adapter
This FC simplex metal fiber optic adapter provides stable optical mating for singlemode and multimode networks across telecommunications, computer networks, CATV lines, and active device terminations. Constructed with a solid metal housing and a precision alignment sleeve, this adapter ensures consistent physical contact with low insertion loss. It is designed to fit circular panel cutouts with flat anti-rotation profiles in both small D and big D configurations, securing tightly to patch frames and distribution boxes using a threaded barrel, washer, and nut.
Product Configuration
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Connector Interface: FC to FC.
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Body Style: Simplex round D-type.
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Panel Cutout Profiles: Small D (11 mm) and Big D (13 mm).
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Fiber Mode Options: Singlemode and multimode.
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Polish Type Options: UPC, PC, and APC.
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Housing Material: Metal.
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Alignment Sleeve Material: Zirconia ceramic (ZrO2) or phosphor bronze.
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Mounting Hardware: Threaded barrel with washer and hex nut.
Applications
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Telecommunication Networks: Main distribution frames, optical distribution frames (ODF), and optical cross-connects.
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FTTH / FTTx Deployments: Fiber distribution hubs, street-side cabinets, and outdoor boundary boxes.
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Premises Termination: Wall-mounted terminal boxes, customer drop points, and fiber adapter plates.
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Computer Networks: Local area network backbones, data links, and active device termination.
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CATV Networks: Headend optical transmission systems and node distribution.
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Instrumentation & Test Equipment: Front-panel optical interfaces for power meters, light sources, and test benches.
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High EMI/RFI Environments: Enclosures requiring metal hardware for shielding continuity and physical durability.
Selection Considerations for the FC Simplex Metal Fiber Adapter
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Cutout Size Selection: Verify the panel punching dimensions prior to ordering. Specify the 11 mm small D version for high-density modern plates, or the 13 mm big D version for standard legacy enclosures. Both sizes prevent the connector from twisting inside the hole when the outer threaded coupling nut is tightened.
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Alignment Sleeve Material: Select zirconia ceramic sleeves for singlemode cables to maintain tight axial alignment on small fiber cores. Phosphor bronze sleeves are suitable for multimode installations.
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Polish Type Matching: Ensure the adapter internal keying matches the cable plant polish. Do not mate an APC connector to a UPC connector inside the adapter; the difference between the 8-degree angled face and flat face causes an air gap, signal reflection, and core damage.
Frequently Asked Questions
What is the difference between small D and big D FC adapters?
The difference is the mounting hole diameter across the flat anti-rotation edge. Small D requires an 11 mm cutout, whereas big D requires a 13 mm cutout. Both configurations use the identical FC optical interface internally and accept standard FC patch cords.
Can this adapter be used for both singlemode and multimode networks?
Yes. The adapter body accepts both singlemode and multimode FC connectors. Singlemode systems typically require zirconia ceramic sleeves, while multimode systems can use either ceramic or phosphor bronze sleeves.
Does this FC adapter install into standard rectangular SC panel openings?
No. This adapter features a cylindrical threaded barrel designed for round D-shaped cutouts. Installing it into rectangular SC cutouts requires an adapter mounting plate or an SC-footprint hybrid frame.
Conclusion
The FC simplex metal fiber optic adapter delivers dependable optical alignment, mechanical endurance, and anti-rotation stability in both 11 mm small D and 13 mm big D panel cutouts. With full compatibility across singlemode and multimode lines, flexible sleeve options, and an all-metal construction, this adapter provides an enduring connection point for ODFs, patch panels, and field termination enclosures.
