The Dayton 06-500 Spindle Nut is a heavy-duty wheel-end component engineered to match the precise fit and performance of original equipment. Specifically designed for Mack SW56C drive axles, this 6-point nut features an integrated dowel pin to ensure a secure lock within the hub assembly on tapered spindles. It serves as a high-quality replacement for original parts that have been compromised by thread fatigue or wear.
Direct Replacement: Precision-engineered to match the factory fit and function for Mack SW56C drive axle applications.
Integrated Dowel Pin: Features a specialized 6-point design with a dowel pin for accurate indexing and secure locking.
Durable Construction: Manufactured from high-grade materials to withstand high torque and ensure a long service life under heavy loads.
Proven Expertise: Backed by over a century of automotive experience and a U.S.-based team of product experts.
| Attribute | Details |
| Part Number | 06-500 |
| Part Type | Spindle Nut |
| Nut Type | 6-Point with Dowel Pin |
| Spindle Type | Tapered |
| Application | Mack SW56C |
| Axle Type | Drive |
| Thread Size | 2.87-12 in |
| Across the Flats | 4.12 in |
| Height | 0.37 in |
| Weight | 0.90 lbs |
This spindle nut is a direct functional equivalent to the following OEM and industry part numbers:
Mack: 25QJ168, 23QJ138
PACCAR: L2376
VMRS: 011-001-016
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