SM adapters
Single mode adapters are mostly either blue (UPC) or green (APC). They are colour coded so that installers can deduce the type of mating connector easily. SM adapters have stricter specs than MM adapters. It is due to the size of the fiber core. APC adapters have even stricter standards than UPC adapters.
Single mode adapters
SC/SC-simplex
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7262038 (Seikoh Giken)
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7268991 (HJ3W)
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SC/SC SM-simplex-adapter, for SC-UPC-connectors
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Colour blue
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7264740 (Seikoh Giken)
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7268997 (HJ3W)
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SCA/SCA SM-simplex-adapter, for SC-APC-connectors
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Colour green
SC/SC-duplex
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7262039 (Seikoh Giken)
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7268985 (HJ3W)
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SC/SC SM-duplex-adapter, for SC-UPC-connectors
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Colour blue
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7264741 (Seikoh Giken)
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7268995 (HJ3W)
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SCA/SCA SM-duplex-adapter, for SC-APC-connectors
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Colour green
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7269030
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SC/SCA SM-duplex-adapter
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Colour blue and green
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One side is for SC-UPC connectors and the other is for SC-APC connectors
LC/LC-simplex
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7269031
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LC/LC SM-simplex-adapter, for LC-UPC-connectors
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Colour blue
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7269018
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LCA/LCA SM-simplex-adapter, for LC-APC-connectors
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Colour blue
LC/LC-duplex
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7262040 (Seikoh Giken)
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7268987 (HJ3W)
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LC/LC SM-duplex-adapter, for LC-UPC-connectors
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Colour blue
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7264761 (Seikoh Giken)
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7268993 (HJ3W)
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LCA/LCA SM-duplex-adapter, for LC-APC-connectors
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Colour green
LC/LC-quattro
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7268989
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LC/LC SM-quadruplex-adapter, for LC-UPC-connectors
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Colour blue
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7268994
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LCA/LCA SM-quadruplex-adapter, for LC-APC-connectors
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Colour green
