The MIL-DTL-38999 Series I connectors offer high-performance connectivity solutions for harsh environments. With up to 128 contacts in an insert, these circular receptacles ensure reliable electrical connections. Featuring front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, they provide versatility in installation. Constructed with high-strength aluminum shells and available in various plating options, including gold, electroless nickel, and others, these connectors are durable and corrosion-resistant. Meeting military specification MIL-DTL-38999 I, they guarantee optimal performance in extreme conditions, with an operating temperature range from -65°C to 200°C. Suitable for applications requiring environmental resistance, these connectors are ideal for aerospace, defense, and industrial use.