The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65°C to 200°C, these connectors offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The connectors come in high-strength aluminum shells with a choice of plating options, including cadmium-free finishes. Ideal for military and aerospace applications, they ensure durability and conductivity, with a mating life of 500 cycles. The bayonet coupling and box mounting flange make them easy to install, while their RoHS compliance reflects a commitment to environmental standards.