MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize durable M39029 rear release crimp contacts. Constructed with aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors ensure reliable operation in temperatures ranging from -65 °C to 200 °C. Perfect for military and industrial applications, they provide secure and efficient electrical connections for demanding environments.