The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts contained in an insert. These environmentally sealed connectors have a wide operating temperature range from -65°C to 200°C. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse application needs. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offering plating options such as cadmium and nickel, they ensure durability and performance. With a focus on RoHS compliance, these connectors are ideal for demanding military and industrial applications.