MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts sealed within their inserts. With an operating temperature range of -65°C to 200°C, they offer reliable performance in extreme conditions. Available in various configurations such as front and rear wall mounts, jam nuts, and box mounts, these connectors provide flexibility for different installation needs. Utilizing M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12, they ensure secure connections. Constructed with aluminum shells and offering plating options like electroless nickel and cadmium finishes, they meet stringent military specifications. The connectors, with gold-plated removable crimp contacts, guarantee efficient conductivity and durability with a mating life of 500 cycles. Suitable for applications requiring EMI/RFI shielding and environmental resistance, they are a reliable choice for demanding environments.