MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These connectors, compliant with military specification MIL-DTL-38999 II, come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes with 52 insert arrangements, they use M39029 rear release crimp contacts in multiple sizes. Constructed with aluminum shells and offered in different plating options including cadmium-free finishes, they ensure reliable performance with RoHS compliance. The straight plugs, with options for RFI grounding and 90-degree cable clamp, feature gold contact plating for enhanced conductivity. Ideal for demanding applications, these connectors are suitable for military and industrial use, providing secure and durable electrical connections.