MIL-DTL-38999 Series II connectors feature up to 128 contacts housed in a sealed insert, designed for rugged environments with a wide operating temperature range of -65 °C to 200 °C. These harsh environment connectors come in various configurations like front and rear wall mounts, jam nuts, and box mounts, offering versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offering plating options including cadmium-free finishes, they ensure durability and compliance with RoHS standards. Perfect for military and industrial applications, these connectors guarantee secure and high-performance electrical connections.