The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts sealed within an insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different applications. The connectors utilize M39029 rear release crimp contacts, ensuring secure connections. Constructed with aluminum shells and offering multiple plating options, including cadmium-free finishes, they meet stringent military specifications. Suitable for use in aerospace, defense, and industrial settings, these connectors are dependable for critical operations.