MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts within an insert that is environmentally sealed. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, they are versatile for different applications. The connectors come in aluminum shells with options for plating, including cadmium-free finishes for RoHS compliance. Utilizing M39029 rear release crimp contacts, they ensure secure and efficient connectivity. These connectors, with a service rating of II, are ideal for demanding military and industrial environments.