MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 52 insert arrangements available, they accommodate M39029 rear release crimp contacts, ensuring secure connections. Constructed with high-strength aluminum shells and various plating options, including cadmium-free finishes, these connectors guarantee durability and reliability. Operating in a wide temperature range from -65°C to 200°C, they are ideal for demanding applications where ruggedness is essential.