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 configurations including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure reliable performance. Crafted from aluminum with options for plating, including cadmium-free finishes, they meet RoHS compliance standards. Ideal for military and industrial use, these connectors provide durable connectivity with gold-plated removable crimp contacts and a bayonet mating system, suitable for demanding environments.