MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, offering robust environmental sealing for reliable performance in harsh conditions. With an operating temperature range from -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they ensure versatility in installation. The connectors come in aluminum shells with options for plating, such as gold, electroless nickel, and cadmium-free finishes, meeting different environmental requirements. Utilizing M39029 rear release crimp contacts, they guarantee secure connections. Designed for military specifications, these connectors are built for durability, with a service rating of E and a mating life of 500 cycles. Suitable for box and through bulkhead mounting, they provide reliable connectivity in challenging environments.