MIL-DTL-38999 Series II connectors, featuring up to 128 contacts, offer robust environmental sealing and a wide operating temperature range of -65 °C to 200 °C. Designed for harsh environments, these connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes with 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offering multiple plating options, including RoHS compliant finishes, they ensure durability and performance. Perfect for military and aerospace applications, these connectors guarantee secure and efficient electrical connections in demanding scenarios.