The MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65°C and 200°C, these connectors come in various styles, including front and rear wall mount, jam nut, and box mount receptacles. Available in aluminum shells with multiple plating options, they ensure reliable performance with RoHS compliant finishes. With removable crimp contacts and a bayonet mating type, these connectors offer durability and conductivity, making them ideal for harsh industrial applications.