The MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts sealed for protection and capable of operating in temperatures ranging from -65 °C to 200 °C. Available in various configurations such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. With options for straight, RFI grounding, and standard plugs, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating different contact sizes. Constructed with aluminum shells and offering plating options like electroless nickel and cadmium finishes, they ensure durability and reliable performance. Certified for RoHS compliance, these connectors are ideal for military and industrial applications, meeting stringent quality standards for connectivity in harsh conditions.