The MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts in an insert, designed for harsh environments with a wide operating temperature range of -65 °C to 200 °C. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they provide versatile installation possibilities. With a choice of 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure reliable signal transmission. Constructed with aluminum shells and available in multiple plating options, such as cadmium and nickel, they guarantee durability and performance in demanding applications. RoHS certified finishes are also offered, catering to environmental compliance needs. The Series II connectors, meeting MIL-DTL-38999 specifications, are ideal for military, aerospace, and industrial use cases requiring secure and high-quality electrical connections.