The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert and boasting environmental sealing. With a wide operating temperature range from -65°C to 200°C, these connectors offer reliability in extreme conditions. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The connectors come in high strength aluminum shells with options for plating, including cadmium-free finishes. Offering front and rear wall mount, as well as jam nut receptacles, they ensure versatility in installation. With a bayonet coupling design and gold contact plating, these connectors guarantee efficient and durable electrical connections for military and industrial applications.