The MIL-DTL-38999 Series II connectors are designed for demanding environments, offering up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, they provide reliable performance in extreme conditions. These connectors feature various mounting options, including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering a choice of plating options, including cadmium-free finishes, they ensure durability and compliance. Perfect for military and industrial applications, these MIL-DTL-38999 Series II connectors provide EMI/RFI shielding and are designed for 500 mating cycles, meeting stringent environmental standards.