MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, boasting environmental sealing and a wide operating temperature range of -65 °C to 200 °C. These connectors come in various styles including front and rear wall mount, jam nut, and box mount receptacles, catering to different installation needs. Available in 9 shell sizes with 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offering multiple plating options, such as electroless nickel and cadmium finishes, these connectors ensure durability in harsh environments. With a focus on quality, they are designed to meet stringent military specifications for performance and reliability.