MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, with an operating temperature range from -65 °C to 200 °C. This harsh environment connector family offers front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they come in a range of plating options including cadmium-free finishes. Suitable for demanding applications, these connectors are designed for durability and reliability, meeting stringent military specifications.