The MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a sealed insert. Designed for harsh environments, they operate between -65 °C and 200 °C, featuring front wall mount, rear wall mount, and jam nut receptacles. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for secure connections. Constructed with durable aluminum shells and various plating options, including RoHS-certified finishes, they ensure reliable performance. With a mating type of bayonet coupling and contact gender of female, these connectors are suitable for a wide range of applications requiring environment-resistant and conductive connectivity.