MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting options such as front wall, rear wall, jam nut, and box mount receptacles, they offer versatility in applications. The connectors come in 9 shell sizes with 52 insert arrangements, using M39029 rear release crimp contacts. Constructed with aluminum shells and offering multiple plating options including cadmium-free finishes, they ensure durability and reliability. Meeting military specification MIL-DTL-38999 II, these circular plugs are ideal for demanding environments requiring EMI/RFI shielding and high performance.