MIL-DTL-38999 Series II connectors are designed for demanding environments, with up to 128 contacts housed in a secure insert. These connectors offer reliable performance in extreme temperatures, ranging from -65 °C to 200 °C. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for efficient connectivity. Constructed with aluminum shells and offering plating options including cadmium-free finishes, these connectors ensure durability and compliance with RoHS standards. Perfect for military and industrial applications, they guarantee high conductivity and environmental resistance, with a service life of 500 cycles.