MIL-DTL-38999 Series II connectors are designed for demanding environments, featuring up to 128 contacts sealed for protection. With an impressive operating temperature range of -65 °C to 200 °C, these connectors offer reliability in extreme conditions. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount, they provide flexibility for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating options like electroless nickel, they ensure durability and longevity. These connectors, meeting stringent military specifications, are ideal for critical connectivity needs in aerospace, defense, and industrial sectors.