MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure reliable connectivity in military and industrial applications. The high-strength aluminum shells come in a range of plating options, including cadmium-free finishes, meeting RoHS certification. With gold-plated contacts and a bayonet mating design, these connectors guarantee secure and durable electrical connections for demanding environments.