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. Offering front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, they come in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, these connectors are available in various plating options, including cadmium-free finishes. With high strength aluminum shells, they ensure durability and reliability, meeting MIL-DTL-38999 I military specifications for critical applications.