MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts and environmental sealing for reliable performance. With an operating temperature range of -65 °C to 200 °C, these connectors are suitable for a wide range of applications. Featuring various mounting options such as front wall mount, rear wall mount, jam nut, and box mount receptacles, they provide flexibility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering plating options including cadmium and nickel, they ensure durability and conductivity. RoHS compliant finishes are also available. Suitable for military and industrial use, these connectors are essential for maintaining connectivity in demanding conditions.