1"-14 Fine Thread 6-Slot Spindle Castle Nut
for Dexter, AL-KO, and Rockwell Trailer Axles
Heavy-duty 1"-14 fine thread spindle castle nut designed to secure hub and bearing assemblies on standard trailer spindles. This 6-slot (6-castellation) nut fits most Dexter, AL-KO, and Rockwell axle hubs rated between 2,000 lb and 7,000 lb. Ideal for axle maintenance, rebuilds, or spindle repair work where a cotter-pin-secured nut is required.
Fitment & Application
- Fits standard 1"-14 fine thread spindles on most 2K–7K axles
- Compatible with Dexter, AL-KO, Rockwell, and Quality Trailer Axles
- Used to secure hub bearings to spindle with a cotter pin (not included)
- Common for utility, car hauler, cargo, and equipment trailers
- Note: For 10K or 12K heavy-duty axles, use the appropriate larger nut
Specifications
| Thread Size | 1"-14 Fine Thread (UNF) |
| Style | 6-Slot Castle (6 Castellations) |
| Material | Machined Steel with Corrosion-Resistant Finish |
| Axle Rating Range | 2,000 lb – 7,000 lb |
| Securement | Uses Standard Cotter Pin (not included) |
| Brand Compatibility | Dexter, AL-KO, Rockwell, Quality, Lippert |
| Country of Origin | Varies (USA or OEM Import) |
Installation Notes
- Always torque spindle nuts to manufacturer specifications
- Ensure threads are clean and lightly lubricated before installation
- Align castle slots with cotter pin hole; never back off more than 1/4 turn
- Inspect for thread wear or burrs before reuse
For help identifying spindle hardware or verifying thread size, contact R & P Carriages at (815) 357-3292. Our parts specialists can match you to the correct castle nut or repair kit.
Shipping
We ship quickly and carefully, with tracking provided on every order. Most items ship the same or next business day. Your parts will arrive safely and on time, ready to use.
Returns & Guarantee
Your satisfaction is guaranteed. Returns, refunds, and exchanges are accepted — no hassle. We stand behind every part we sell, so you can purchase with confidence.
Committed to Customer Service
At R and P Carriages, we believe in treating our customers like family. Whether you need a small replacement part or a complete trailer service, we’re here to help with friendly, expert support every step of the way.
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