The MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting options like front and rear wall mount, as well as jam nut receptacles, they offer RFI grounding plugs for enhanced performance. With 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in multiple sizes. Constructed with high strength aluminum shells and offering a choice of plating options including cadmium-free finishes, they ensure durability and reliability. The connectors, compliant with MIL-DTL-38999 I military specification, are ideal for applications requiring secure electrical connections in demanding environments.