MIL-DTL-38999 Series I connectors feature up to 128 contacts in a sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes. With front and rear wall mount options and jam nut receptacles, they ensure secure connections. Utilizing M39029 rear release crimp contacts, they offer reliable performance with gold plating and a mating style of bayonet coupling. These connectors are classified under the MIL-DTL-38999 I military specification, ideal for applications requiring durability and environmental resistance.