The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with a wide operating temperature range from -65 °C to 200 °C. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility for different applications. With shell sizes ranging from 9 to 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and plated with options like cadmium and nickel, they ensure durability and performance. Designed for military specifications, these connectors are ideal for use in demanding environments requiring secure and high-performance electrical connections.