MIL-DTL-38999 Series II connectors, with up to 128 contacts in an insert, are designed for harsh environments with a wide operating temperature range of -65 °C to 200 °C. Offering various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they ensure versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options, including RoHS compliant finishes, they guarantee durability and reliability. Ideal for military and aerospace applications, these connectors are engineered to withstand challenging conditions while maintaining optimal performance.