MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount receptacles and jam nut receptacles, they offer RFI grounding plugs and utilize M39029 rear release crimp contacts. With 9 shell sizes and 52 insert arrangements, these connectors are versatile and reliable. Constructed with high-strength aluminum shells and offered in multiple plating options, they meet stringent military specifications for durability and performance. RoHS compliant finishes are also available, making them suitable for a wide range of applications requiring secure and efficient connectivity in demanding environments.