The 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. Available in various shell sizes and insert arrangements, these connectors offer versatility with front wall mount, rear wall mount, and jam nut receptacles. Utilizing M39029 rear release crimp contacts, they ensure reliable connectivity in sizes 22D, 22M, 22, 20, 16, and 8. Crafted from high-strength aluminum, they come in a range of plating options, including cadmium-free finishes for RoHS compliance. With gold contact plating and a bayonet coupling, they provide secure connections for military and industrial applications, meeting MIL-DTL-38999 I specifications.