The Dayton 06-501 Spindle Nut Washer is a heavy-duty wheel-end component designed to provide a secure, locked fit for Mack drive axles. This lock-ring style washer features a "with holes" design to ensure precise indexing and adjustment on tapered spindles. Engineered from high-quality materials, it is the ideal replacement for original washers that have become worn or distorted.
Direct Replacement: Precision-matched to the fit and function of the factory washer for Mack SW56C drive axle applications.
Reliable Performance: A dependable fix for missing or worn washers, ensuring the spindle nut remains properly seated.
Built for Durability: Constructed from premium materials to provide a long service life and resist mechanical wear in heavy-duty environments.
Trusted Quality: Developed by a team of U.S.-based experts with over 100 years of specialized automotive experience.
| Attribute | Specification |
| Part Number | 06-501 |
| Part Type | Spindle Nut Washer |
| Washer Type | Lock Rings (with holes) |
| Spindle Type | Tapered |
| Application | Mack SW56C |
| Axle Type | Drive |
| Inner Diameter (ID) | 2.87 in |
| Outer Diameter (OD) | 4.43 in |
| Height | 0.15 in |
| Weight | 0.60 lbs |
Industry Cross References
This part is a direct functional equivalent to the following OEM and industry part numbers:
Mack: 23QJ129, 23QJ125
Spicer: 12-444, 12444
PACCAR: L2375
VMRS: 011-001-017
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
