MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility for different applications. With options for straight, RFI grounding, and standard plugs with a 90-degree cable clamp, they cater to diverse connectivity needs. Utilizing M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12, these connectors ensure reliable performance. Constructed with aluminum shells and offered in plating options like electroless nickel, they provide durability and RoHS compliance. The MS27472 connectors are ideal for military and industrial use, with a service rating of M and service class E for environment-resistant box and through bulkhead mounting receptacle types.