MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility for different applications. With options for straight, RFI grounding, and standard plugs, they come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells and a range of plating finishes, such as cadmium and nickel, they ensure durability and reliability. Meeting MIL-DTL-38999 II military specifications, these connectors are ideal for demanding electronic and communication systems.