The MIL-DTL-38999 Series I connectors boast high performance with up to 128 contacts in an environmentally sealed insert, offering durability in harsh conditions. Designed for a wide operating temperature range from -65 °C to 200 °C, these connectors feature front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. Compliant with military specification MIL-DTL-38999 I, they come in nine shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for secure connections. Constructed with high strength aluminum shells and available in various plating options, including RoHS certified finishes, these connectors ensure reliability in demanding applications.