The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With up to 128 contacts in an insert, they ensure reliable connectivity in extreme conditions. These circular connectors, compliant with military specification MIL-DTL-38999 I, offer a wide operating temperature range from -65 °C to 200 °C. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells and various plating options, including cadmium-free finishes, they guarantee durability and performance. Suitable for applications requiring environmental resistance and conductive properties, these connectors are essential components in aerospace, defense, and industrial systems.