MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts and environmental sealing for reliable performance. With an operating temperature range of -65 °C to 200 °C, these connectors offer versatility in various applications. Available in different mounting styles such as front wall mount, rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. The connectors come in aluminum shells with options for plating finishes like cadmium and nickel, meeting RoHS compliance standards. Utilizing M39029 rear release crimp contacts, they ensure secure connections with sizes ranging from 22D to 12. The straight plugs, including RFI grounding variants, feature a 90-degree cable clamp for efficient cable management. Suitable for military and industrial use, these connectors guarantee durability with a mating life of 500 cycles and conductivity for optimal signal transmission in demanding environments.