MIL-DTL-38999 Series II connectors feature up to 128 contacts within an insert, designed for harsh environments with operating temperatures ranging from -65 °C to 200 °C. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating options like electroless nickel and cadmium finishes, they ensure durability and reliability. With a mating type of bayonet and contact gender of male, these connectors are suitable for military and industrial applications requiring high-performance connectivity in challenging conditions.