BKL Electronic Power Connectors Accessories BNC connector 630432 - BKL 0401071/D, The BKL Electronic 0401071/D is a BNC connector socket designed for vertical mounting with a 50 O impedance. Produced by BKL Electronic, this high-frequency coaxial connector is ideal for RF and antenna applications. It is suitable for use in high-frequency equipment and communication devices. BKL 0401071/D BNC Socket Vertical 50 O Crimp for Thin Ethernet Cable