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 various mounting options, including front wall, rear wall, and jam nut receptacles. With a wide operating temperature range from -65°C to 200°C, they ensure reliable performance in extreme conditions. Utilizing M39029 rear release crimp contacts, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating diverse application needs. Constructed with high-strength aluminum shells and available in different plating options, including cadmium-free finishes, they meet stringent military specifications. Suitable for demanding applications, these connectors provide secure and durable electrical connections in aerospace, defense, and industrial settings.