MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front and rear wall mount options, as well as jam nut receptacles, ensuring secure installations. Compliant with military specification MIL-DTL-38999 I, they guarantee reliable performance in extreme conditions, with an operating temperature range from -65 °C to 200 °C. Available in nine shell sizes and 52 insert arrangements, they accommodate various contact types, including M39029 rear release crimp contacts. Constructed with high-strength aluminum shells and with a choice of plating options, such as cadmium-free finishes, these connectors are durable and corrosion-resistant. Perfect for military and aerospace applications, they provide efficient and dependable electrical connections.