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, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with a choice of plating options including cadmium-free finishes. The MS27505 connectors, with a box mounting flange, are ideal for back panel installations, utilizing removable crimp contacts for secure connections. With a bayonet coupling design, they ensure easy and efficient mating, making them suitable for military and aerospace applications requiring durability and reliability.