MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts and a wide operating temperature range from -65 °C to 200 °C. These connectors are ideal for harsh conditions, with various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options such as gold and electroless nickel, they ensure reliable performance. Meeting military specifications, these connectors are RoHS compliant and provide excellent conductivity for demanding applications.