MIL-DTL-38999 Series I connectors offer high-performance connectivity 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 of -65°C to 200°C, these connectors are versatile and reliable. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. The connectors come in high-strength aluminum shells with various plating options, including cadmium-free finishes for RoHS compliance. Perfect for military and industrial applications, these connectors ensure durability and conductivity, making them ideal for demanding environments.