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. These thin-walled, restricted length connectors come in various mounting options like front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts and are RoHS compliant with options for cadmium-free finishes. Ideal for military and industrial applications, these connectors offer reliable performance with their durable aluminum shells and conductive contact options.