MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, they feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements, these connectors support various applications using M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they come in plating options like cadmium and electroless nickel. RoHS compliant finishes are available, ensuring reliability in diverse operating conditions. With a wide temperature range from -65 °C to 200 °C, these connectors are ideal for demanding military and industrial settings.