MIL-DTL-38999 Series I connectors offer rugged reliability with up to 128 contacts in an insert. Designed for harsh environments, they feature front and rear wall mount options, along with jam nut receptacles for secure installations. Operating between -65 °C and 200 °C, these connectors are ideal for military and aerospace applications. With a range of shell sizes and insert arrangements, they accommodate various contact sizes, including M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they are available in different plating options, such as gold and electroless nickel, ensuring optimal performance and durability. RoHS compliant finishes are also offered, providing environmentally friendly choices. These connectors, with their bayonet coupling and environmental sealing, are essential for critical electronic systems in demanding environments.