The 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 options such as front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility in military and aerospace applications. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure secure and reliable connectivity. Constructed with aluminum shells and offering plating options including cadmium and nickel, they meet stringent performance requirements. The straight plug configuration with 61 gold-plated, removable crimp contacts in size 20, guarantees optimal conductivity and durability. Ideal for demanding environments, these connectors are RoHS compliant and engineered for 500 mating cycles, making them essential components in critical systems.