The 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 styles such as front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility in installation. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure secure and reliable connections. Constructed with aluminum shells and offering multiple plating options including gold, these connectors are RoHS compliant and suitable for military and industrial applications requiring high-performance in demanding environments.