MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With environmental sealing and an operating temperature range of -65°C to 200°C, they ensure reliable performance in demanding conditions. Available in various mounting styles including jam nut, box mount, and rear release crimp contacts, these connectors offer versatility for different applications. Constructed with aluminum shells and offering plating options such as electroless nickel and cadmium finishes, they provide durability and corrosion resistance. Compliant with military specification MIL-DTL-38999, these connectors are ideal for use in aerospace, defense, and other rugged environments.