The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65°C to 200°C, they offer reliable performance in a variety of conditions. Available in various mounting styles including jam nut, front and rear wall mount, and box mount receptacles, these connectors are versatile for different applications. Made with aluminum shells and offering multiple plating options including gold, electroless nickel, and cadmium-free finishes, they ensure durability and conductivity. The connectors utilize M39029 rear release crimp contacts, providing secure connections. With a mating type of bayonet coupling and a service rating of M, they are suitable for military and industrial use.