MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range from -65°C to 200°C. This connector family includes front and rear wall mount, as well as jam nut receptacles with RFI grounding plugs, providing versatility in harsh environments. With 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes, ensuring reliable connections. Constructed with high-strength aluminum shells, they come in plating options like cadmium and nickel, with RoHS compliant finishes available. Designed for military specs, these connectors are ideal for applications requiring durability and performance in demanding conditions.