MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, with environmental sealing and operating temperatures ranging from -65 °C to 200 °C. This harsh environment connector family offers front and rear wall mount, as well as jam nut receptacles with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, these connectors come in multiple plating options, including cadmium-free finishes. Ideal for military applications, they provide reliable connectivity with gold-plated removable crimp contacts. With a bayonet mating mechanism and a service rating of II, they ensure durability in demanding environments.