MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an insert. Designed for harsh environments, they are sealed and durable, operating efficiently in temperatures ranging from -65°C to 200°C. Available in various configurations, including front and rear wall mount options, as well as jam nut receptacles, these connectors feature RFI grounding plugs for enhanced functionality. Compliant with military specification MIL-DTL-38999 I, they come in nine shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in multiple sizes. Constructed with high-strength aluminum shells, these connectors are offered with a choice of plating options, including cadmium-free finishes for RoHS compliance. Ideal for demanding applications, they ensure reliable performance with a mating life of 500 cycles and a service rating of M and Twinax.