The MIL-DTL-38999 Series I connectors offer high performance in harsh environments, featuring up to 128 contacts in an insert. With front wall mount, rear wall mount, and jam nut receptacles, they provide versatility in connectivity. These connectors, compliant with military specification MIL-DTL-38999 I, ensure reliable operation in extreme conditions with an operating temperature range from -65 °C to 200 °C. Available in 9 shell sizes and 52 insert arrangements, they accommodate various applications. Constructed with high-strength aluminum shells and offering multiple plating options, including cadmium-free finishes, they prioritize durability and environmental compliance. The connectors, suitable for box mounting and featuring bayonet coupling, cater to diverse needs in the aerospace, defense, and industrial sectors.