MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts, designed for harsh environments with an operating temperature range of -65°C to 200°C. Featuring front wall mount, rear wall mount, and jam nut receptacles, these connectors ensure secure installations. Compliant with military specification MIL-DTL-38999 I, they come in 9 shell sizes and 52 insert arrangements, accommodating various contact types including M39029 rear release crimp contacts. Constructed with high-strength aluminum shells and available in multiple plating options such as gold, electroless nickel, and cadmium-free finishes, these connectors guarantee reliable performance in demanding applications. With a mating type of bayonet and shell style of box mounting flange receptacle, they are suitable for environments requiring environmental resistance. RoHS compliance is available upon request.