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| Part Number | 5503640-1 | 5504640-1 | 5503640-2 | 
|---|---|---|---|
| Manufacturer | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | 
| Product Status | Obsolete | Discontinued at Digi-Key | Obsolete | 
| Type | Adapter | Coupler | Adapter | 
| Convert From (Adapter End) | FC Receptacle | SC Receptacle | FC Receptacle | 
| Convert To (Adapter End) | ST Receptacle | SC Receptacle | ST Receptacle | 
| Simplex/Duplex | Simplex | Duplex | Simplex | 
| Mode | Singlemode/Multimode | Multimode | Singlemode/Multimode | 
| Mounting Type | Panel Mount, Square Flange | Panel Mount, Flange; Snap-In | Panel Mount, Square Flange | 
| Housing Material | Brass | Polybutylene Terephthalate (PBT), Glass Filled | Brass | 
| Ferrule Material | Metal | Metal | Ceramic | 
| Features | Dust Cap | Dust Cap | Dust Cap | 
| Color | Silver | Beige | Silver |