Amphenol Aerospace's Quadrax contacts are designed for high-performance applications demanding exceptional data transfer rates and EMI compatibility. These contacts feature a unique design with four strategically spaced inner contacts forming two 100 or 150 Ohm matched impedance differential pairs, ensuring efficient signal transmission. The rugged outer contact provides enhanced durability, making them suitable for demanding environments. They are commonly used in Gigabit Ethernet assemblies and other high-speed data communication systems. Modification of MIL-DTL-38999 connectors is required to accommodate the keyed contacts. Consult Amphenol for availability of various finishes and crimping tools.