MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, boasting environmental sealing and a wide operating temperature range from -65 °C to 200 °C. Available in front and rear wall mount options, as well as jam nut receptacles, this harsh environment connector family offers versatility in installation. With 9 shell sizes and 52 insert arrangements, they accommodate various contact types, including M39029 rear release crimp contacts. Constructed with high strength aluminum shells, they come in different plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to different application needs. Certified for RoHS compliance, these connectors are ideal for demanding military and industrial environments.