MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in various configurations such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating different contact sizes. Constructed with aluminum shells and offering multiple plating options including cadmium-free finishes, they ensure reliable performance while meeting RoHS compliance. Perfect for military and industrial use, these connectors guarantee durability and conductivity with 500 mating cycles and environment-resistant design.