Cummins Turbocharger Mounting Lock Nut | 4298975 | M10 x 1.5 Flanged | ISX QSX

Cummins turbocharger mounting lock nut, part number 4298975. M10 x 1.5 thread, hex flanged, six point, 12 mm tall. Secures the turbocharger to the exhaust manifold and resists loosening under vibration. Supersedes Cummins 3104738.

Key Features

• Self-locking flanged design, resisting loosening under engine vibration
• M10 x 1.5 thread, 6 point, 12 mm tall
• Secures the turbocharger to the exhaust manifold
• Supersedes Cummins 3104738

Specifications

• Part number: 4298975
• Component type: Turbocharger mounting lock nut
• Condition: New
• Thread: M10 x 1.5
• Head: Hex flanged, 6 point
• Height: 12 mm
• Outside diameter: 17.9 mm
• Supersedes: 3104738
• Sold as: each

Compatibility & Fitment

• Engines: Cummins ISX and QSX, 15 L, EPA13
• Position: turbocharger to exhaust manifold

Fitment gate — verify your thread size and nut height against the nuts you are removing before ordering. This nut is M10 x 1.5, 12 mm tall.

Installation note — replace turbocharger mounting nuts whenever the turbocharger comes off. Self-locking nuts lose their locking function once used, and a mounting nut that backs off produces an exhaust leak at the flange that can shorten the life of a new turbocharger. A turbocharger mounting flange typically uses four nuts.

Conclusion

This is the Cummins turbocharger mounting lock nut 4298975, M10 x 1.5 and 12 mm tall, superseding 3104738. Replace mounting nuts whenever the turbocharger is removed, since self-locking nuts do not retain their locking function after use.