MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. This connector range includes various receptacle types such as front and rear wall mounts, jam nuts, and box mounts, offering versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and plated with options like electroless nickel, these connectors ensure durability. Meeting military specifications, they are ideal for applications requiring high performance in demanding conditions.