MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With front wall mount, rear wall mount, and jam nut receptacles, they provide versatile connectivity options. These connectors, compliant with military specifications, offer reliable performance in a wide temperature range from -65 °C to 200 °C. Constructed with high-strength aluminum shells, they are environmentally sealed and come in various plating options, including cadmium-free finishes. The MS27505 model, with a back panel box mounting flange, utilizes removable crimp contacts for secure connections. With a bayonet coupling design and gold contact plating, these connectors ensure conductivity and durability, making them suitable for demanding applications.