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, these connectors come in high-strength aluminum shells with options for plating such as cadmium and nickel. Offering RoHS certified finishes, they ensure reliable connectivity with gold-plated contacts. With bayonet coupling and back panel box mounting, they are ideal for military and aerospace applications requiring durable and secure electrical connections.