FC Simplex Big D-Type Fiber Adapter

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The FC SX Big D-Type Adapter is a metal-bodied simplex fiber adapter featuring a larger D-shaped mounting nut, ideal for panels or enclosures that require stronger mechanical retention and easier tool handling.

Designed for single-mode FC connectors, it ensures stable and precise alignment with a ceramic sleeve and supports low insertion loss (≤0.2dB). The metal housing enhances durability and grounding performance, making it suitable for demanding environments.

Its Big D-type flange-less design is commonly used in fiber distribution frames, testing equipment, and patch panels with pre-set big D cutouts.

Product Specifications

Adapter Type: FC Body Style: Simplex
Insertion Loss: ≤0.2dB Durability: >1000times
Mounting Type: Without Flange Aligment Sleeve Material: Ceramic
Material: Metal RoHS Compliancy Status: Compliant

FAQ

What does “Big D-Type” mean in this adapter?
It refers to the size of the external metal nut — the Big D type uses a larger hex nut, which offers better panel retention and is easier to secure with standard tools.
Yes, it supports standard FC simplex connectors with PC or APC polish types.
It’s often used in testing platforms, wall-mounted panels, and fiber optic termination boxes requiring high mechanical strength and reliable grounding.

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