MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range from -65°C to 200°C. These harsh environment connectors come in various configurations, including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts. With aluminum shells and multiple plating options, including cadmium free finishes, these connectors are ideal for military and industrial applications requiring reliable performance in demanding conditions.