MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, suitable for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors offer versatility in design. Made of high-strength aluminum, they come with plating options such as cadmium and nickel, including RoHS-certified finishes. With options for front and rear wall mount, as well as jam nut receptacles, they cater to diverse mounting needs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure and reliable connections. Bayonet coupling and gold plating on contacts enhance performance, making them ideal for military and industrial applications requiring durability and conductivity.