1445904-1 is a jam nut accessory designed for AMP Circular Connectors, specifically for Shell Size 11 applications. This component features a 3/4-20 UNEF-2B thread specification and is manufactured from brass with nickel plating to ensure corrosion resistance and durability. The jam nut has a nominal diameter of 0.875 inches (22.25 mm) and a thickness of 0.125 inches (3.2 mm), providing secure fastening for connector assemblies. It is commonly used in commercial signal and power applications where reliable mechanical connection and environmental sealing are required, and is RoHS compliant for modern electronic equipment standards.