MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. With options for straight, RFI grounding, and standard plugs, these connectors come in aluminum shells with multiple plating choices including electroless nickel and cadmium finishes. Compliant with RoHS regulations, they ensure reliable performance with gold-plated removable crimp contacts. Suitable for military and aerospace use, these connectors are engineered for durability, with a service rating of I and a mating life of 500 cycles.