MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Featuring various mounting options like front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure secure installations. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offering plating options including cadmium-free finishes, these connectors meet RoHS compliance standards. Suitable for military and industrial applications, they provide durable and efficient electrical connections in demanding environments.