MIL-DTL-38999 Series II connectors are engineered for rugged environments, offering up to 128 contacts within an insert. Designed for durability, they feature environmental sealing and a wide operating temperature range of -65 °C to 200 °C. The harsh environment thin-walled connectors come in various mounting options, including front and rear wall mount, jam nut, and box mount receptacles. Available in multiple shell sizes and insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering a range of plating options, these connectors are ideal for military and industrial applications requiring reliability in extreme conditions. RoHS compliant finishes are available, ensuring environmental responsibility.