NUT - JAM 5/8-18 (Clark CL23.10)

A damaged jam nut can allow threaded fasteners to loosen under vibration, leading to mechanical misalignment or component separation. During inspection, a jam nut of this size—5/8-18 thread—should be checked for thread galling or distortion that prevents proper seating. Keeping a jam nut in sound condition helps maintain clamping force in bolted joints where a standard nut alone might back off. This aftermarket replacement part references Clark catalog number CL23.10. The nut functions as a thinner fastener used to lock another nut in place by jamming against it. Verify the serial number or application, then call (562) 693-7748. A loose jam nut can cause progressive wear on threaded studs or bolts, eventually requiring replacement of both components.

Part number variants: CL23.10, cl23.10