The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65°C to 200°C, these connectors are ideal for demanding applications. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount, they offer versatility in installation. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating different contact types including M39029 rear release crimp contacts. Constructed with aluminum shells and offering multiple plating options, including cadmium-free finishes, they ensure durability and reliability. Perfect for military and industrial use, these connectors provide secure and efficient electrical connections in challenging conditions.