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 of -65 °C to 200 °C. Offering front and rear wall mount options, as well as jam nut receptacles, this connector family is versatile for various applications. With 52 insert arrangements and utilizing M39029 rear release crimp contacts, they ensure reliable connectivity. Available in 9 shell sizes with high-strength aluminum shells, plating options include cadmium-free finishes for RoHS compliance. The connectors, meeting military specification MIL-DTL-38999, are ideal for demanding environments where durability and performance are crucial.