MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front and rear wall mount options, as well as jam nut receptacles. With a wide operating temperature range of -65°C to 200°C, they are suitable for demanding applications. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating various contact types, including M39029 rear release crimp contacts. Constructed with high-strength aluminum shells and available in different plating options, these connectors ensure reliable performance in rugged conditions. RoHS compliant finishes are also available for environmentally conscious applications.