The 242178 is an SMA female to TNC bulkhead female adapter designed for RF applications. It features a durable, nickel-plated brass body and a gold-plated beryllium copper contact for reliable signal integrity. The adapter utilizes a PTFE insulator and includes a silicone gasket, lock washer, and hex nut for secure panel mounting. This component is ideal for creating a feedthrough connection on a panel or chassis between systems using SMA and TNC interfaces.