MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting options such as front wall mount, rear wall mount, jam nut, and more, these connectors offer versatility in installation. They come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. With aluminum shells and plating options like gold, electroless nickel, and cadmium finishes, they ensure durability and reliability. RoHS compliant versions are also available, making them suitable for a wide range of applications.