MIL-DTL-38999 Series I connectors offer rugged reliability with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, they feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, these connectors utilize M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells and various plating options including gold, electroless nickel, and cadmium-free finishes, they ensure optimal performance in temperatures ranging from -65 °C to 200 °C. Ideal for military and industrial applications, these connectors provide a durable solution for demanding environments.