The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for different plating finishes, including RoHS certified cadmium-free coatings. Suitable for military and industrial applications, they provide secure connectivity with bayonet coupling and rear release crimp contacts. The Series I connectors are ideal for use in wall mount and jam nut receptacles, offering durability and conductivity for demanding environments.