MIL-DTL-38999 Series II connectors boast a robust design, featuring up to 128 contacts housed within an insert for high-density connectivity. Well-suited for harsh environments, these connectors offer reliable performance with an impressive operating temperature range of -65°C to 200°C. Available in various mounting options such as front wall, rear wall, jam nut, and box mount receptacles, they cater to diverse installation needs. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in multiple sizes. Crafted from durable aluminum, they are offered with plating options including gold, electroless nickel, and various RoHS compliant finishes. With a bayonet coupling mechanism and N keyway polarization, these connectors ensure secure mating and alignment. Suitable for military and industrial applications, they exhibit excellent conductivity and ingress protection, making them ideal for demanding environments.