MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts sealed within an insert. With a wide operating temperature range of -65°C to 200°C, these connectors are suitable for demanding applications. Available in various shell sizes and insert arrangements, they offer versatility in connectivity. Constructed with high-strength aluminum shells and offering multiple plating options, including RoHS-certified finishes, they ensure durability and reliability. The connectors come in different mounting styles, such as front wall mount, rear wall mount, and jam nut receptacles, providing flexibility for installation. Meeting military specification MIL-DTL-38999 I, these circular receptacles are ideal for use in aerospace, defense, and other rugged environments.