MIL-DTL-38999 Series II connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts and environmental sealing. Operating between -65 °C and 200 °C, these versatile connectors come in various styles including front and rear wall mounts, jam nuts, and box mounts. Available in 9 shell sizes with 52 insert arrangements, they use M39029 rear release crimp contacts. Constructed with aluminum shells and plated with options like gold and electroless nickel, these connectors ensure durability. Meeting military specification MIL-DTL-38999 II, they guarantee high performance in demanding applications.