The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with a wide operating temperature range from -65°C to 200°C. Available in various mounting styles including front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, they offer versatility for different applications. With options for straight, RFI grounding, and standard plugs, these connectors come in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Constructed with aluminum shells and plated with various coatings such as electroless nickel and cadmium finishes, they meet RoHS compliance standards. The connectors are ideal for military and industrial use, providing reliable performance in demanding conditions.