MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they come in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections with sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax). Constructed with high-strength aluminum shells and available in various plating options including cadmium-free finishes, they meet RoHS compliance standards. Perfect for demanding applications, these connectors provide reliable performance in environment-resistant settings.