MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, engineered for harsh environments with an operating temperature range from -65°C to 200°C. Available in various styles including front and rear wall mount, jam nut receptacles, and RFI grounding plugs, these connectors offer versatility in connectivity solutions. Compliant with military specification MIL-DTL-38999 I, they come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they provide durability for demanding applications. Plating options include light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes available. Suitable for Box Mounting with a bayonet coupling, these connectors are designed for secure and reliable electrical connections in challenging environments.