The MIL-DTL-38999 Series II connectors feature up to 128 contacts, offering reliable connectivity in harsh environments. With an operating temperature range of -65°C to 200°C, these circular connectors are built to withstand extreme conditions. Available in various mounting options including front wall mount, rear wall mount, and jam nut receptacles, they cater to diverse installation needs. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering plating options such as electroless nickel and cadmium finishes, they ensure durability and corrosion resistance. Suitable for military and industrial applications, these connectors are RoHS compliant, meeting environmental standards.