MIL-DTL-38999 Series I connectors offer high performance with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, they feature front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. With a wide operating temperature range from -65 °C to 200 °C, these connectors are suitable for demanding applications. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connectivity. The high strength aluminum shells come in various plating options, including cadmium-free finishes for RoHS compliance. Overall, these connectors provide durability, versatility, and performance for military and industrial use.