MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range from -65°C to 200°C. These harsh environment connectors, available in various mount types, including front and rear wall mount, jam nut, and box mount receptacles, provide reliable connectivity in demanding applications. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and plated with options like electroless nickel, they meet stringent military specifications for performance and durability. Featuring RoHS compliant finishes, these connectors are ideal for use in rugged environments where reliability is paramount.