MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts and environmental sealing for reliable performance. With an operating temperature range of -65°C to 200°C, they offer versatility in various conditions. Available in multiple shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts for secure connections. The connectors come in durable aluminum shells with options for plating, including cadmium-free finishes. Offering front and rear wall mount and jam nut receptacles, they meet stringent military specifications for rugged applications.