The 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. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility in installation. With options for straight, RFI grounding, and standard plugs, and utilizing M39029 rear release crimp contacts in multiple sizes, they ensure secure and reliable connections. Constructed with aluminum shells and offering a range of plating finishes, including RoHS compliant options, these connectors are suitable for military and industrial applications requiring durability and performance.