The MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. Available in various mounting options including front and rear wall mount, as well as jam nut receptacles, these connectors offer RFI grounding plugs for added versatility. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high strength aluminum shells, they come in a range of plating options, including cadmium-free finishes for RoHS compliance. Ideal for military and industrial applications, these connectors ensure reliable performance with gold-plated contacts, meeting stringent quality standards for conductivity and environmental resistance.