The MIL-DTL-38999 Series I connectors are rugged and reliable, featuring up to 128 contacts in an insert for versatile connectivity. Designed for harsh environments, they offer front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With an operating temperature range from -65°C to 200°C, these connectors provide durability in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells, they come in various plating options including cadmium-free finishes for RoHS compliance. Ideal for military and industrial applications, these connectors ensure efficient and dependable performance in demanding settings.