The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts within an insert and offering front wall mount, rear wall mount, and jam nut receptacles. With a wide operating temperature range of -65°C to 200°C, they are ideal for demanding applications. These connectors, compliant with military specification MIL-DTL-38999 I, come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they are available with various plating options including cadmium-free finishes. Their bayonet coupling and environmentally sealed design make them reliable for use in aerospace, military, and industrial settings.