MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65 °C and 200 °C, these connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Offering versatility, they are available as straight, RFI grounding, and standard plugs with a 90 degree cable clamp. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in different sizes. Constructed with aluminum shells and various plating options like gold, electroless nickel, and cadmium finishes, these connectors are durable and reliable. Perfect for military applications, they meet MIL-DTL-38999 II specifications and offer RoHS compliant cadmium-free finishes.