MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65 °C and 200 °C, these connectors offer versatility with various mounting options including 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 for reliable connectivity. Constructed with aluminum shells and offered in multiple plating options, they ensure durability with RoHS-certified finishes. Ideal for military and industrial applications, these connectors guarantee secure and efficient electrical connections in demanding conditions.