The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, offering reliable connectivity in harsh environments. These environmentally sealed connectors have a wide operating temperature range from -65 °C to 200 °C, ensuring performance in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse applications. With 52 insert arrangements and M39029 rear release crimp contacts, they provide flexibility for custom configurations. Constructed with aluminum shells and plated with options like gold, electroless nickel, and cadmium finishes, they guarantee durability and conductivity. Designed to meet MIL-DTL-38999 II military specifications, these connectors are ideal for demanding aerospace, defense, and industrial applications.