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. Available in various shell sizes and insert arrangements, these connectors offer versatility for different applications. The high strength aluminum shells come with options for plating, including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they ensure secure connections. Utilizing M39029 rear release crimp contacts, the connectors are reliable with contact sizes ranging from 22D to 8 (coax and twinax). With a bayonet mating type and a service rating of M, they are suitable for military and industrial applications. Choose from various contact plating options like gold, ensuring optimal conductivity. Meeting MIL-DTL-38999 I specifications, these connectors guarantee performance and durability in demanding environments.