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 like front and rear wall mount, jam nut, and box mount receptacles, alongside straight, RFI grounding, and standard plugs, they offer versatility for different applications. Compliant with military specification MIL-DTL-38999 II, these connectors come in 9 shell sizes and 52 insert arrangements, using M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating options including cadmium and nickel, they ensure durability and reliability. RoHS compliant versions are also available, catering to environmental standards. Suitable for demanding environments, these connectors guarantee high performance with features like EMI/RFI shielding, removable crimp contacts, and Bayonet coupling, making them ideal for military, aerospace, and industrial applications.