MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front and rear wall mount options, along with jam nut and box mount receptacles. With a wide operating temperature range from -65 °C to 200 °C, these connectors are suitable for demanding applications. Constructed with aluminum shells and offering various plating options including gold, electroless nickel, and cadmium-free finishes, they ensure reliable conductivity. Compliant with military specification MIL-DTL-38999 II, these connectors come in a straight plug configuration with removable crimp contacts, ideal for secure and durable connections in aerospace, defense, and other rugged environments.