MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These environmentally sealed connectors boast a wide operating temperature range from -65 °C to 200 °C. Available in various mounting styles, including front and rear wall mount, jam nut, and rear/ front box mount receptacles, they offer versatility in installation. With options for straight, RFI grounding, and standard plugs, along with 52 insert arrangements and M39029 rear release crimp contacts, these connectors meet diverse connectivity needs. Constructed with aluminum shells and offered in RoHS compliant finishes, such as electroless nickel and cadmium-free coatings, they ensure durability and reliability in military and industrial applications.