US Patent 6921283 BNC connector having visual indication

A connector system allows for visual determination of mating or engagement of a jack-side connector and a plug-side connector. A jack-side connector has a first securing device and a plug-side connector having a sleeve rotatably coupled thereto. The sleeve has a second securing device that is complementary to the first securing device and an indicator located on an edge of the sleeve. The indicator is contrasted against a characteristic (e.g., color, material, etc.) of a portion (e.g., a washer) of the connector system to provide visual indication that the first securing device is securely engaged with the second securing device.