MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different applications. The connectors come in aluminum shells with options for plating, including cadmium-free finishes for RoHS compliance. Utilizing M39029 rear release crimp contacts, they ensure secure connections with sizes ranging from 22D to 12. Suitable for military and industrial use, these connectors are durable and dependable for demanding environments.