The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various mounting options like front wall, rear wall, jam nut, and box mounts, they offer versatility in installation. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure reliable connectivity. Constructed with aluminum shells and plated in options like electroless nickel and cadmium, these connectors meet stringent military specifications for durability. Perfect for applications requiring rugged and secure electrical connections, they are ideal for use in demanding industrial and military environments.