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 and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. With a wide operating temperature range of -65 °C to 200 °C, they are ideal for demanding applications. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for reliable connections. Constructed with high-strength aluminum shells, they come in various plating options, including cadmium-free finishes for RoHS compliance. Suitable for military and industrial use, these connectors provide durability and performance in challenging conditions.