MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in a rugged insert, ideal for harsh environments. Featuring a wide operating temperature range of -65 °C to 200 °C, these connectors are designed for reliability in demanding conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different applications. The connectors, with 9 shell sizes and 52 insert arrangements, utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options, including cadmium-free finishes, they ensure durability and compliance with RoHS standards. Suitable for military and industrial use, these MIL-DTL-38999 II connectors are essential for maintaining reliable electrical connections in critical systems.