MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an 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 cater to diverse installation needs. 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 plated with options like electroless nickel and cadmium finishes, they ensure durability and reliability. Compliant with RoHS standards, these connectors are ideal for military and industrial applications requiring high-performance connectivity in challenging conditions.