MIL-DTL-38999 Series I connectors are designed for harsh environments with up to 128 contacts housed in an insert. Featuring front wall mount, rear wall mount, and jam nut receptacles, these connectors offer RFI grounding plugs for added protection. With a wide operating temperature range from -65 °C to 200 °C, they are suitable for various applications. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells and available in different plating options such as cadmium, electroless nickel, and anodized aluminum, they ensure durability and reliability. These connectors meet MIL-DTL-38999 I military specifications, making them ideal for demanding environments.