MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are versatile and durable. Available in various shell sizes and insert arrangements, they offer flexibility for different applications. The connectors come in high-strength aluminum shells with a choice of plating options, including RoHS-certified finishes. With front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide secure connections in demanding settings. The use of M39029 rear release crimp contacts ensures reliable performance, while the bayonet coupling mechanism facilitates easy mating. Suitable for military and industrial use, these connectors are ideal for applications requiring reliable electrical connections in challenging conditions.