MIL-DTL-38999 Series I connectors are designed for demanding environments, featuring up to 128 contacts in an insert with environmental sealing. Operating efficiently in temperatures ranging from -65 °C to 200 °C, these connectors offer versatility with front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. Constructed with high-strength aluminum shells and various plating options, including RoHS certified finishes, these connectors ensure durability and performance. Suitable for military and industrial applications, they provide secure and conductive connectivity in harsh conditions.