The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert for robust connectivity. With a wide operating temperature range of -65°C to 200°C, these connectors are ideal for demanding applications. Offering various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for secure connections. Made with aluminum shells and plated with options like electroless nickel, they ensure durability and reliability. Meeting military specification MIL-DTL-38999 II, these connectors are suitable for use in rugged environments where performance is critical.