MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With environmental sealing and a wide operating temperature range from -65 °C to 200 °C, these connectors offer reliable performance. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with aluminum shells and offering options for plating finishes such as cadmium and nickel, they ensure durability and corrosion resistance. These circular connectors, meeting MIL-DTL-38999 II specifications, are ideal for military and industrial applications, guaranteeing secure and efficient electrical connections.