MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating range from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer versatility for different applications. These connectors, compliant with military specification MIL-DTL-38999 I, come in high-strength aluminum shells with options for plating, including cadmium-free finishes. Offering reliable connectivity, they use M39029 rear release crimp contacts and are suitable for front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. With gold contact plating and a mating type of bayonet, they ensure secure and efficient connections. These connectors are ideal for demanding environments, with a service rating of II and ingress protection against environmental factors.