MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65°C to 200°C, these connectors provide reliable performance in extreme conditions. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse application needs. Featuring aluminum shells with options for RoHS-compliant finishes, such as electroless nickel and cadmium olive drab, these connectors ensure durability and compliance with environmental regulations. The MS27473 model, a Straight Plug variant with Crimp Type, Bayonet Coupling, and Gold contact plating, guarantees high-quality electrical connections. With a service rating of M and a mating life of 500 cycles, these connectors are suitable for demanding military and industrial applications.