The 112290 is a BNC panel jack connector designed for four-hole panel mounting with 50 ohm impedance rating. The connector features a brass body with nickel finish, a teflon insulator, and beryllium copper contact pins with gold plating to ensure reliable electrical performance and corrosion resistance. Key dimensional specifications include a body diameter of 3.00 mm, overall length of 26.70 mm, and mounting hole diameter of 3.20 mm (four holes). This connector is commonly used in RF and microwave applications, test equipment, and instrumentation systems where secure panel mounting and impedance matching are critical requirements.