MIL-DTL-38999 Series I connectors are designed for harsh environments, offering up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65°C to 200°C, these connectors are highly durable. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatile connectivity options. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable performance. Constructed with high-strength aluminum shells, they come in various plating options including gold, electroless nickel, and anodized aluminum. RoHS certified finishes are also available, ensuring compliance with environmental standards. Suitable for military and industrial applications, these connectors offer 500 mating cycles and reliable conductivity.