NUT HEX LOCK .25-28 NL (CAT CT2F3219)

A damaged lock nut can compromise threaded joint security, leading to loosening under vibration. During inspection, a hex lock nut of this size (0.25-28 thread) may show wear or deformation that reduces its locking ability. Keeping a hex lock nut in sound condition helps maintain consistent clamping force in bolted assemblies. This aftermarket replacement part references CAT as the OE maker and cross-references part number CT2F3219. The nut type provides a plain mechanical function: it threads onto a bolt to secure components. A generic failure consequence is that a worn lock nut may allow the joint to loosen, risking part detachment. Verify the serial number or application, then call (562) 693-7748.

Part number variants: CT2F3219, ct2f3219