The TE Connectivity 1457062-1 is a simplex singlemode LC coupler — a panel-mount adapter that joins two LC connectors back-to-back, converting one LC receptacle to another LC receptacle. It carries a ceramic ferrule for singlemode alignment precision, a snap-in panel mount, and includes a dust cap to protect the optical bore when unmated. The blue housing is standard for singlemode; the thermoplastic body is rated UL94 V-0 for equipment use inside enclosures.
If you are qualifying a replacement, the LC simplex singlemode coupler form factor is common across several suppliers; confirm the panel cutout and ferrule alignment spec against a candidate substitute before committing.