MIL-DTL-38999 Series I connectors offer robust connectivity solutions with up to 128 contacts in an environmentally sealed insert. Operating efficiently in extreme temperatures ranging from -65°C to 200°C, they are ideal for harsh environments. Featuring front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs, this connector family provides versatility. With 52 insert arrangements and M39029 rear release crimp contacts in various sizes, including coax and twinax, they ensure reliable performance. Constructed with high-strength aluminum shells and available in different plating options, such as electroless nickel and cadmium finishes, these connectors cater to diverse needs. RoHS certified cadmium-free variants are also offered. Suitable for military and industrial applications, MIL-DTL-38999 Series I connectors guarantee durability and conductivity in demanding environments.