MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts in an environmentally sealed insert. Built for harsh environments, these connectors maintain performance in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options such as wall, jam nut, and box mounts, they cater to diverse installation needs. Available in 9 shell sizes and 52 insert arrangements, they accommodate M39029 rear release crimp contacts in different sizes. The connectors, crafted from aluminum, come with plating options including cadmium-free finishes for environmental compliance. With gold-plated contacts and a mating type of bayonet, they ensure reliable electrical connections in demanding applications. Suitable for military and industrial use, these connectors guarantee durability with a mating life of 500 cycles and conductivity for efficient signal transmission.