The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range from -65°C to 200°C. Available in various mounting options including 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 specifications. Constructed with aluminum shells and offered in multiple plating options such as gold, electroless nickel, and cadmium free finishes, they ensure reliable performance. RoHS compliant, these connectors meet stringent environmental regulations, making them suitable for a wide range of applications in military and industrial settings.