MIL-DTL-38999 Series II connectors are ruggedly built for harsh environments, with up to 128 contacts sealed within their inserts. Designed for durability, they can operate in temperatures ranging from -65 °C to 200 °C. Available in various mount types such as front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility in deployment. Featuring thin-walled construction, they come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. The connectors, crafted from aluminum, boast multiple plating options including cadmium-free finishes for RoHS compliance. With a service rating of Class E and a mating life of 500 cycles, they ensure reliable performance in demanding applications.