MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Offering front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs, they ensure secure connectivity. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, they come in multiple plating options including cadmium-free finishes. Meeting military specification MIL-DTL-38999 I, these circular plugs guarantee reliability with gold-plated contacts, 1500 mating cycles, and RoHS compliance. Perfect for demanding applications, they provide conductive conductivity, environmental resistance, and efficient bayonet coupling.