MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts, ideal for harsh environments. These environmentally sealed connectors feature a wide operating temperature range from -65 °C to 200 °C, ensuring durability in extreme conditions. Available in various configurations, including front and rear wall mount, jam nut, and box mount receptacles, as well as straight and 90-degree cable clamp plugs. With 52 insert arrangements and M39029 rear release crimp contacts, they provide versatile options for different applications. Constructed with aluminum shells and offering multiple plating options, including RoHS compliant finishes, these connectors guarantee reliable and secure connections. Suitable for military and industrial use, they boast a service rating of II and a mating life of 500 cycles, making them a dependable choice for demanding environments.