MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, with an operating temperature range of -65 °C to 200 °C. These harsh environment connectors come in various mounting options like front wall mount, rear wall mount, jam nut, and more. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12, offering versatility. Constructed with aluminum shells and plated with options like light iridescent yellow cadmium and electroless nickel, they cater to diverse needs. The RoHS compliant connectors are designed for demanding applications, ensuring reliable performance in rugged environments.