The MIL-DTL-38999 Series I 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 shell sizes and insert arrangements, they offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Crafted from high-strength aluminum, these connectors come in a range of plating options including cadmium-free finishes, ensuring durability and reliability in military and industrial applications. With gold-plated removable crimp contacts and bayonet mating, they guarantee secure connections for 500 cycles. Suitable for box and through bulkhead mounting, these connectors are rated for environmental resistance, making them ideal for demanding operational conditions.