MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front and rear wall mount options, as well as jam nut and box mount receptacles. These connectors offer reliable performance in extreme conditions, with an operating temperature range from -65°C to 200°C. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and various plating options, including cadmium-free finishes, they ensure durability and longevity. Suitable for military and industrial applications, these connectors provide EMI/RFI shielding and environmental resistance for seamless connectivity.