MIL-DTL-38999 Series I connectors, designed for harsh environments, feature front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With up to 128 contacts, they ensure secure connectivity in demanding conditions. These 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 reliable performance. The high-strength aluminum shells come with various plating options, including cadmium-free finishes. These circular receptacles, with bayonet coupling, provide a rugged and environmentally sealed solution for critical applications.