The 031-221 is a bulkhead BNC jack featuring a nickel-plated brass body and a PTFE insulator. This bayonet-style connector allows for quick and secure connection and disconnection, with a positive locking mechanism. Connection is achieved by a simple quarter turn of the coupling nut. Known for its durability and reliable performance, BNC connectors are compatible with a wide range of RG and industry-standard cables, supporting various termination styles.