The MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts within an insert for high-density connectivity. With a wide operating temperature range from -65°C to 200°C, these connectors are ideal for harsh conditions. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. Constructed with aluminum shells and offering multiple plating options including gold, electroless nickel, and cadmium finishes, these connectors ensure reliable performance. Utilizing M39029 rear release crimp contacts, they provide secure and efficient connections. RoHS compliant options are also available, making them suitable for environmentally conscious applications. With a service rating of M and service class E, these connectors are designed for demanding environments, offering durability and longevity.