1"-14 6-Slot Spindle Castle Nut for Dexter Alko Rockwell Trailer Axles (FA-SN100)

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

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.