MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs, they offer versatility in connectivity. With 9 shell sizes and 52 insert arrangements, including M39029 rear release crimp contacts, these connectors ensure secure and reliable connections. Constructed with high-strength aluminum shells and various plating options, such as cadmium-free finishes, they meet the rigorous demands of military and industrial applications. The RoHS compliant connectors are suitable for use in environments requiring high conductivity and resistance to environmental factors.