The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts and environmental sealing for reliable performance. With an operating temperature range of -65 °C to 200 °C, these connectors are suitable for a wide range of applications. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility in installation. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering a choice of plating options, including RoHS compliant finishes, they ensure durability and compatibility. With gold-plated contacts, they provide excellent conductivity and mating reliability. Ideal for military and industrial use, these connectors meet MIL-DTL-38999 II specifications for quality and performance in demanding environments.