The BNC to 4mm adapter is suitable for use with automotive diagnostic equipment and oscilloscopes.
The adapter has a 4mm aperture, dimensions of 5.9 × 2.9 cm, 50Ω BNC impedance, supports up to 500V and 3A, with resistance under 0.8mΩ, and an operating temperature range of -20°C to +80°C (-4°F to 176°F).
The adapter is made of metal connectors with an insulated plastic body.
It is a kind of BNC to 4 mm adapter connects two 4 mm "banana" plugs to a BNC socket, it is used to connect test leads or probes to measurement devices for signal testing.
The adapter is installed between the oscilloscope input and the vehicle diagnostic points.