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 of -65 °C to 200 °C. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility in installation. With straight, RFI grounding, and standard plug options, they come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating choices such as cadmium finishes, electroless nickel, and black anodized aluminum, these connectors are durable and reliable. Suitable for military and industrial applications, they ensure secure and efficient electrical connections in demanding conditions.