The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and offering front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for diverse applications. These connectors, available in aluminum shells with various plating options, ensure durability and reliability. Utilizing M39029 rear release crimp contacts, they come in 9 shell sizes and 52 insert arrangements, accommodating different connectivity needs. Ideal for military and aerospace use, they meet stringent MIL-DTL-38999 II specifications, guaranteeing high performance in demanding conditions.