MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, suitable 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 aluminum shells with options for plating, including cadmium-free finishes. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, all designed for durability and reliability. Utilizing M39029 rear release crimp contacts, these connectors are ideal for military and aerospace applications, offering high performance with gold-plated contacts and a bayonet coupling for secure connectivity.