MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts in an insert and environmental sealing. Operating in temperatures ranging from -65 °C to 200 °C, these connectors offer reliability in extreme conditions. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering plating options like electroless nickel, they ensure durability. RoHS compliant finishes guarantee environmental responsibility. Ideal for military and industrial applications, these connectors provide a high level of performance and versatility.