Eight Pack - 5/8\"-18 Cone Lug Nuts Trailer Wheel Lug Nut Set For Sale - New and Used

TRAILER WHEEL HARDWARE
Eight Pack - 5/8\"-18 Cone Lug Nuts Trailer Wheel Lug Nut Set
SKU: 6-109X8

Set of eight 5/8\"-18 fine-thread cone-style lug nuts for trailer wheel applications using a conical tapered seat. Designed for compatible trailer hubs and wheels requiring 5/8\" wheel studs and tapered-seat lug nuts.


8 Lug Nuts Included


5/8\"-18 Fine Thread


Conical Tapered Seat




Detailed Measurements



Key Dimension
Measurement


Thread Size
5/8\"-18 fine thread


Hex / Socket Size
1-1/16\"


Seat Style
Conical / tapered seat


Stud Size
5/8\"






Specifications



Specification
Detail


Part Number
6-109X8


Listing SKU
6-109X8


Brand
R&P Carriages


Product Type
Trailer wheel cone lug nut set


Quantity Included
8 lug nuts


Application
Trailer wheels with matching 5/8\"-18 studs and tapered seats


Material / Finish
Zinc-plated steel


Key Measurement
5/8\"-18 thread, 1-1/16\" hex




Fitment / Application



Category
Details


Vehicle / System
Trailer wheel and hub assemblies


Primary Fit
Wheels requiring 5/8\"-18 conical seat lug nuts


Secondary Fit / Common Uses
Heavy-duty trailer axle applications, commonly 8K-12K where specs match


Notes
Confirm stud diameter, thread pitch, seat style, and torque requirement before ordering or installing.







Key Features




5/8\"-18 Fine Thread
Designed for trailer wheel studs with a 5/8\" diameter and 18 threads per inch.


Conical Tapered Seat
Cone-seat design fits wheels with matching tapered lug nut seats.




Zinc-Plated Steel
Steel construction with zinc plating for added rust and corrosion resistance.


8-Pack Set
Includes eight lug nuts for trailer wheel replacement, service, or spare hardware stock.





Included Components



Quantity
Item


8
5/8\"-18 cone-style trailer wheel lug nuts


Not Included
Wheel studs, wheels, hubs, washers, tools, or additional hardware







Overview


This listing is for one set of eight 5/8\" cone lug nuts for trailer wheel service and replacement. These lug nuts use a 5/8\"-18 fine thread, 1-1/16\" hex size, and conical tapered seat. The zinc-plated steel finish helps resist rust and corrosion in normal trailer use.






R&P Service Insight


Lug nut fitment depends on the wheel stud, thread pitch, and wheel seat style. Always confirm all three before installation.

• Thread Check: Fits 5/8\"-18 fine-thread wheel studs.
• Seat Check: For wheels requiring a cone-style tapered lug nut seat.
• Tool Size: Uses a 1-1/16\" hex / socket size.

R&P Knowledge Hub

Compatibility: Designed for trailer wheels using 5/8\"-18 wheel studs and conical tapered-seat lug nuts.
Vehicle / System Fit: Commonly used on heavy-duty trailer axle applications, including many 8,000 lb to 12,000 lb axle setups where the wheel and stud specifications match.
Installation Notes: Confirm the stud diameter, thread pitch, wheel seat style, and torque specification for your axle or wheel before installation.
Performance Insight: Cone lug nuts center the wheel against the matching tapered seat. Correct seating helps provide even clamping force and reduces the risk of wheel movement.



Brand & Fitment Note

Selling Brand: R&P Carriages
Application Reference: Trailer wheel lug nut set for 5/8\"-18 studs with conical tapered-seat wheels.
What This Means: This listing includes eight individual lug nuts, enough for one 8-lug trailer wheel position when the matching stud and seat style are required.
Before Ordering: Match the old lug nut and wheel seat style. Do not substitute cone-seat lug nuts on wheels designed for flat, flange, mag, or other seat styles.



R&P Repair Insight


Lug nuts should be inspected whenever wheels are removed, studs are replaced, or axle service is performed. Replace damaged, rounded, cross-threaded, corroded, or mismatched lug nuts before returning the trailer to service.

• Check Threads: Threads should start smoothly by hand and tighten evenly.
• Check Seat Style: The cone seat must match the tapered seat in the wheel.
• Check Torque: Always torque lug nuts to the wheel, hub, or axle manufacturer specification.

Important: Using the incorrect lug nut seat style can damage the wheel and compromise wheel retention. Always verify 5/8\"-18 thread size, conical tapered seat style, socket size, and manufacturer torque specification before installation.



Search This Part on NeedATrailerPart.com


Need help confirming fitment? Match your existing lug nut thread size, seat style, and wheel stud before ordering.



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