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, they ensure secure connections in demanding applications. These connectors, compliant with military specification MIL-DTL-38999 I, offer versatility with 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with high-strength aluminum shells and various plating options, including cadmium-free finishes, they provide reliable performance. Suitable for aerospace, defense, and industrial applications, these circular plugs are engineered for durability and conductivity, meeting stringent quality standards for environmental resistance and service longevity.