The Dayton 06-238 is a high-precision spindle nut engineered to meet the demanding requirements of Rockwell TP series trailer axles. Designed for original equipment fit and function, this 8-point nut features an integrated dowel pin for secure, reliable bearing adjustment and retention.
Direct Replacement: Precision-matched to replace the factory spindle nut on Rockwell TP "Original Design" trailer axles.
Integrated Dowel Pin: Features a pre-installed dowel pin to work seamlessly with locking washers, preventing nut migration and ensuring wheel end safety.
Heavy-Duty Construction: Manufactured from high-grade steel to resist fatigue and withstand the high torque and axial loads of commercial trailer operations.
Reliable Performance: Backed by over a century of automotive expertise and a team of U.S.-based product specialists.
| Attribute | Value |
| Part Number | 06-238 |
| Nut Type | 8-Point (with Dowel Pin) |
| Thread Size | 3.50 in |
| Across the Flats | 4.87 in |
| Height | .37 in |
| Spindle Type | Parallel |
| Axle Application | Rockwell TP (Original Design) |
| Kit Compatibility | Component of Kit 06-2401 |
| Weight | 1.10 LBS |
This spindle nut is a direct interchange for the following industry part numbers:
| Manufacturer | Part Number | Notes |
| Meritor/Rockwell | 1227-K-1389 | Primary OE Reference |
| Euclid | E7664 | Aftermarket Interchange |
| Paccar | L3221 | Direct Replacement |
| VMRS | 011-001-016 | Industry Standard Code |
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