The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With an operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in various mounting styles such as front wall, rear wall, jam nut, and box mount receptacles, they offer flexibility in installation. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating different contact sizes for optimal connectivity. Constructed with aluminum shells and offering multiple plating options, including RoHS compliant finishes, they ensure durability and reliability. With features like bayonet coupling and removable crimp contacts, these connectors meet military specification MIL-DTL-38999 II, making them suitable for critical operations.