MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts in an insert, ideal for harsh environments. Featuring various mounting options like front and rear wall mount, jam nut, and box mount receptacles, they ensure secure installations. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable performance. With an operating temperature range of -65 °C to 200 °C, they are well-suited for demanding applications. Constructed with aluminum shells and offering plating options including electroless nickel, they provide durability and corrosion resistance. Designed to meet military specifications, these connectors are essential for aerospace, defense, and other high-reliability industries.