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 in applications. These connectors, including front and rear wall mount receptacles and RFI grounding plugs, utilize M39029 rear release crimp contacts. Crafted from high-strength aluminum, they come with plating options such as cadmium and nickel, catering to different requirements. RoHS compliant finishes are also available. With a bayonet coupling and gold contact plating, they ensure reliable performance in demanding settings, making them ideal for military and industrial applications.