The MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature various mounting options such as front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offered in multiple plating options, including RoHS compliant finishes, these connectors ensure durability and versatility. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for demanding applications in military and industrial settings.