MIL-DTL-38999 Series II connectors are designed for demanding environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65°C and 200°C, these connectors come in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts. Constructed with aluminum shells and offering multiple plating options, including RoHS compliant finishes, these connectors ensure reliable performance in harsh conditions. Perfect for military and industrial applications, they provide secure connectivity for critical systems.