MIL-DTL-38999 Series I connectors are rugged and reliable, designed for harsh environments with up to 128 contacts in an insert. These circular connectors feature front and rear wall mount options, as well as jam nut receptacles for secure installations. They are environmentally sealed, operating efficiently in temperatures ranging from -65 °C to 200 °C. The connectors utilize M39029 rear release crimp contacts in various sizes, ensuring a secure and stable connection. With RoHS certified cadmium-free finishes available, including electroless nickel and black anodized aluminum, they offer versatility and durability. Perfect for military and industrial applications, these connectors meet stringent performance standards, making them the ideal choice for demanding environments.