NUT - JAM 5/8-18 (Clark CL3216620)

A damaged jam nut can allow threaded fasteners to loosen under vibration, leading to mechanical misalignment. During inspection, a jam nut that fails to hold torque may indicate wear or thread damage. Keeping a jam nut in sound condition helps maintain clamping force on critical assemblies. This aftermarket replacement part references Clark catalog number CL3216620. The part type is a jam nut, a thin fastener used to lock another nut or bolt in place. A common failure consequence is that a loose jam nut can cause gradual loosening of the primary fastener, risking component separation. Verify the serial number or application, then call (562) 693-7748.

Part number variants: CL3216620, cl3216620