The 919-124J-71P is a 75 ohm MCX jack connector designed for PC mount applications in RF and microwave systems. The connector features a brass body with white bronze plating and beryllium copper gold-plated contacts, ensuring excellent electrical performance and corrosion resistance. The insulator is constructed from TFE fluorocarbon material, providing reliable dielectric properties. Key mounting dimensions include a 0.236 inch square footprint with a 0.051 inch minimum hole diameter, and the connector operates with standard dimensional tolerances of ±0.15 inches for 2-place decimals and ±0.005 inches for 3-place decimals. This connector is commonly used in RF/microwave equipment, test instrumentation, and communication systems where reliable 75 ohm impedance matching and compact PC board integration are required.