MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert. With front and rear wall mount options, as well as jam nut and box mount receptacles, they provide versatile connectivity solutions. These connectors feature a wide operating temperature range from -65°C to 200°C, ensuring reliability in extreme conditions. 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 RoHS certified finishes, they meet stringent military specifications for durability and performance. Perfect for applications requiring EMI/RFI shielding, these connectors are essential for aerospace, defense, and other demanding industries.