MIL-DTL-38999 Series II connectors are designed for rugged environments, offering 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 different plating options, they meet RoHS compliance standards. Featuring M39029 rear release crimp contacts, these connectors are ideal for military and industrial applications requiring reliability and durability in harsh conditions.