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 versatility for different applications. The connectors, made of high-strength aluminum, come with options for RoHS-certified cadmium-free finishes, including gold plating for optimal conductivity. With front and rear wall mount as well as jam nut receptacles, they provide secure connections in military and industrial settings. The bayonet coupling mechanism ensures easy and reliable mating, while the electroless nickel coating enhances durability. Suitable for both wall and jam nut mounting, these connectors meet stringent environmental and performance standards for demanding applications.