MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an insert, suited for harsh environments. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they ensure secure installations. With 9 shell sizes and 52 insert arrangements, including M39029 rear release crimp contacts, they provide versatility. Constructed with high-strength aluminum shells and offering various plating options such as cadmium and nickel, these connectors are durable and reliable. Operating efficiently in temperatures ranging from -65°C to 200°C, they guarantee performance in diverse conditions. With RoHS-certified finishes available, they meet environmental standards while delivering exceptional functionality for military and industrial applications.