Mueller Electric Coaxial Connectors Adapter 617453 - Mueller BU-P4290, Mueller Electric's BU-P4290 is a high-frequency connector featuring a BNC socket to SMA plug configuration. This HF adapter is ideal for converting connections in RF applications. It is widely used in testing and measurement equipment for reliable signal transmissions. Mueller BU-P4290 Adapter BNC Socket-SMA Plug 50O 12.4GHz 1pc