MIL-DTL-38999 Series II connectors feature up to 128 contacts within an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in applications. These connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells and offering multiple plating options, including RoHS compliant finishes, they ensure reliable performance. The connectors, compliant with military specification MIL-DTL-38999 II, are ideal for demanding industrial and aerospace applications, providing durability and conductivity with a service rating of I.