MIL-DTL-38999 Series II connectors offer exceptional performance in harsh environments with up to 128 contacts housed in a rugged insert. These circular connectors are designed for reliability, featuring front and rear wall mount options, as well as jam nut and box mount receptacles. With a wide operating temperature range from -65°C to 200°C, they are suitable for demanding applications. Available in various shell sizes and insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options, including RoHS compliant finishes, these connectors ensure durability and conductivity. Ideal for military and industrial use, they provide environment-resistant sealing and efficient bayonet coupling for easy installation.