MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an insert, designed for harsh environments. Featuring front wall mount, rear wall mount, and jam nut receptacles, they ensure secure installations. These circular connectors, compliant with military specification MIL-DTL-38999 I, operate flawlessly in temperatures ranging from -65 °C to 200 °C. With 52 insert arrangements and M39029 rear release crimp contacts, they provide versatility for various applications. Constructed with high-strength aluminum shells and available in RoHS-certified finishes, including cadmium-free options, these connectors guarantee durability and environmental resistance. Suitable for demanding settings, they are ideal for use in aerospace, defense, and industrial applications.