MIL-DTL-38999 Series I connectors offer robust connectivity solutions with up to 128 contacts, featuring environmentally sealed inserts for reliable performance in harsh conditions. Designed for versatility, these connectors come in various configurations including front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With nine shell sizes and 52 insert arrangements available, they accommodate M39029 rear release crimp contacts in different sizes, ensuring compatibility with a range of applications. Constructed with high strength aluminum shells and offering plating options such as gold, electroless nickel, and anodized aluminum, these connectors meet stringent military specifications for durability and performance. With an operating temperature range of -65°C to 200°C, they are suitable for use in extreme environments. The RoHS compliant cadmium-free finishes further enhance their environmental friendliness, making them a reliable choice for various industrial and military applications.