Hub / Spindle / Axle Nut 13/16"-20 Fine Thread 290-010452

Hub / Spindle / Axle Nut 13/16"-20 Fine Thread 290-010452

Fine-Thread Spindle Nut

The Hub / Spindle / Axle Nut 13/16"-20 Fine Thread 290-010452 is a replacement trailer hardware fastener used on compatible EZ Loader boat trailer hub and spindle assemblies. This nut is designed for 13/16"-20 fine-thread spindle applications where the hub assembly must be properly retained on the trailer axle spindle.

This part may also be described as a hub nut, spindle nut, or axle nut. It is used at the wheel-end assembly and works with the compatible spindle, bearings, washer, retainer, cotter pin, cap, and hub system depending on the trailer model and hub style.

Correct thread size matters because a spindle nut must match the spindle threads exactly. The wrong nut can damage the spindle, prevent correct bearing adjustment, or fail to retain the hub properly.

13/16"-20 Spindle Nut Features

• Replacement hub / spindle / axle nut for compatible EZ Loader trailer wheel-end assemblies
• 13/16"-20 fine-thread design
• Used on compatible trailer spindle and hub applications
• Useful during hub service, bearing service, axle service, or wheel-end repairs
• Helps retain the hub assembly when installed with the proper wheel-end hardware

Typical EZ Loader Trailer Applications

This spindle nut may be used on compatible EZ Loader trailer hub and axle assemblies where a 13/16"-20 fine-thread spindle nut is required. It is part of the wheel-end hardware group and may be used during bearing service, hub replacement, spindle inspection, oil bath hub service, or grease hub service depending on the trailer setup.

Because EZ Loader trailers use different spindle sizes and hub assemblies by model, axle rating, year, and hub style, always compare the old nut and spindle threads before ordering.

Important Difference: Spindle Nut vs. Locknut vs. Lug Nut

This part is a 13/16"-20 fine-thread spindle nut. It is not the same as a 1/2"-13 trailer locknut, a 1/2"-20 lug nut, or a wheel-fastening nut.

A spindle nut is used at the trailer hub and bearing assembly. A lug nut or lug bolt secures the wheel to the hub. A trailer locknut may be used on brackets, U-bolts, bunks, suspension hardware, or other frame hardware. Using the wrong nut can damage threads or prevent the hub from being assembled correctly.

Installation Considerations

• Confirm the spindle thread size is 13/16"-20 fine thread.
• Inspect the spindle threads before installing a replacement nut.
• Do not force the nut if the thread pitch does not match.
• Inspect the bearings, washer, retainer, cotter pin, cap, seal, and hub while servicing the wheel end.
• Follow the correct hub and bearing adjustment procedure for your trailer setup.
• Replace damaged, rounded, corroded, cross-threaded, or questionable spindle nuts before towing.

Hub / Spindle / Axle Nut Fitment Guidance

This is not a universal trailer nut.

• Confirm the old nut is a hub / spindle / axle nut.
• Confirm the thread size is 13/16"-20.
• Confirm the spindle and hub assembly are compatible with this nut.
• Confirm whether your hub uses grease or oil bath lubrication before ordering related service parts.
• Use trailer VIN, old parts, spindle measurements, and photos when checking fitment.

Real-World Insight

The spindle nut is a small part, but it plays an important role in the trailer wheel-end assembly. If the nut is damaged, cross-threaded, rounded, missing, or installed incorrectly, the hub and bearing assembly may not be retained properly. During hub service, it is smart to inspect the spindle threads, bearings, washer, cotter pin or retainer, seal area, and cap before towing again.

Questions or Need Help Matching Parts?

We’re based in Hardeeville, South Carolina, serving customers nationwide.

📞 Call us — we answer the phone and help you get it right.
📧 Send photos if needed — often the fastest way to confirm fitment.

We focus on matching parts correctly the first time.

What to Have Ready When You Call

• Trailer year, make, and model
• VIN, if available
• Old spindle nut size and thread pitch
• Hub style: grease or oil bath
• Photos of the spindle, hub, old nut, washer, retainer, and cap