MIL-DTL-38999 Series II connectors boast up to 128 contacts in an insert, offering robust environmental sealing for reliable performance in harsh conditions. With an impressive operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Featuring various mounting options such as front wall mount, rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different installation needs. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12, ensuring secure and efficient connections. Constructed with aluminum shells and offering options for plating finishes including cadmium-free coatings, these connectors prioritize durability and compliance. Designed for military specifications, they meet stringent performance standards with a service rating of M and service class E, making them suitable for a wide range of applications.