MIL-DTL-38999 Series II connectors offer robust performance in harsh environments with up to 128 contacts and an operating temperature range of -65 °C to 200 °C. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they ensure secure connections in diverse applications. With multiple shell sizes and insert arrangements, these connectors accommodate different contact types, including removable crimp contacts. Constructed with durable aluminum shells and plated with options like electroless nickel, they provide reliable conductivity while meeting MIL-DTL-38999 II military specifications. RoHS compliant finishes are also available, making them suitable for environmentally conscious projects.