MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range from -65°C to 200°C. Available in various shell sizes and insert arrangements, they offer versatility in applications. These connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes, ensuring durability and reliability. With front and rear wall mount options, as well as jam nut receptacles, they provide flexibility for installation. Utilizing M39029 rear release crimp contacts, they guarantee secure connections. Meeting military specification MIL-DTL-38999 I, these circular connectors are ideal for demanding environments where rugged performance is essential.