The MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an insert, designed for harsh environments. These connectors feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With a wide operating temperature range from -65°C to 200°C, they ensure reliable performance in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, they come in multiple plating options, including cadmium-free finishes for RoHS compliance. These circular connectors are ideal for military applications, meeting MIL-DTL-38999 I specifications for durability and performance.