MIL-DTL-38999 Series II connectors are designed to meet the demands of harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65°C to 200°C, these connectors come in various configurations such as front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offering plating options including electroless nickel and cadmium finishes, these connectors ensure durability. Ideal for military and industrial applications, they provide secure and efficient connectivity in challenging conditions.