MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert and offering front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With an operating temperature range of -65 °C to 200 °C, these connectors are environmentally sealed for reliable performance. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts and come in high-strength aluminum shells with various plating options. RoHS-certified finishes are also available, ensuring compliance with environmental standards. Perfect for military and industrial applications, these connectors provide durable and secure electrical connections in demanding conditions.