The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 environmentally sealed contacts in various shell sizes and insert arrangements. With a wide operating temperature range from -65 °C to 200 °C, they offer reliable performance in demanding conditions. These connectors, available in front and rear wall mount options, as well as jam nut receptacles, are ideal for military and aerospace applications. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Constructed with high-strength aluminum shells and offered in different plating options including cadmium-free finishes, they meet RoHS compliance standards. Suitable for straight plug mounting, with gold-plated contacts for enhanced conductivity, these connectors guarantee 500 mating cycles, making them a durable and reliable choice for critical systems.