MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in a sealed insert, designed for harsh environments. Featuring various mounting options like front wall, rear wall, and jam nut receptacles, they ensure versatile installation. Compliant with military specifications, these connectors guarantee reliable performance in extreme conditions, with an operating temperature range from -65°C to 200°C. Utilizing M39029 rear release crimp contacts, they come in 9 shell sizes and 52 insert arrangements, accommodating different applications. Constructed with high-strength aluminum shells and available in various plating options, including cadmium-free finishes, these connectors prioritize durability and environmental safety. With a mating type of bayonet and contact gender being male, they offer secure and efficient connections. Suitable for environment-resistant box and through bulkhead mounting receptacle types, they are ideal for demanding industrial and military applications.