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 front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors come with high strength aluminum shells and plating options such as gold, electroless nickel, and cadmium-free finishes. With a bayonet coupling and A keyway polarization, they ensure secure mating and reliable performance. Suitable for back panel and box mounting with a crimp type design, these connectors are ideal for applications requiring a durable and conductive solution in challenging environments.