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 from -65 °C to 200 °C. Available in various mounting styles like front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility in applications. With straight, RFI grounding, and standard plugs options, they accommodate different cable clamp orientations. Compliant with military specification MIL-DTL-38999 II, these circular connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells, they offer plating choices including cadmium-free finishes. Suitable for demanding environments, these connectors provide reliable performance with a mating life of 500 cycles.