MX 4mm Banana Male Plug Connector Solderable Type Gold Plated (MX-1405)

Same solderable termination as the beryllium copper version, but with a gold-plated contact tip for anyone who specifically wants the long-term oxidation resistance gold provides, especially on a test lead that gets plugged and unplugged frequently over years of bench use. Soldering the wire in gives a permanent joint with no crimp to loosen over time, while the gold plating keeps the mating contact itself performing consistently well past the point where a bare-metal plug would start showing increased contact resistance. A premium option for a precision test lead build where contact quality matters as much as the termination method.