MIL-DTL-38999 Series I connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts sealed for environmental protection. With an operating temperature range of -65°C to 200°C, these circular connectors come in various configurations including front and rear wall mount receptacles and jam nut receptacles, all designed for rugged applications. Compliant with military specification MIL-DTL-38999 I, they boast a durable construction with high-strength aluminum shells and options for plating such as cadmium-free finishes. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts, ensuring secure connections. Their versatility and performance make them ideal for aerospace, defense, and other mission-critical industries.