MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, with environmental sealing for durability in harsh conditions. Operating between -65 °C and 200 °C, these connectors are versatile for various applications. Offering multiple mounting options including front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility in installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and various plating options, including cadmium-free finishes, they ensure reliable performance. Suitable for military and industrial use, these connectors are engineered for rugged environments, meeting stringent quality standards.