At a Glance
- SKU: 6-109x8
PRODUCT INFORMATION
Product Details
TRAILER WHEEL HARDWARE
Eight Pack - 5/8"-18 Cone Lug Nuts Trailer Wheel Lug Nut Set
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.
SKU: 6-109X8 8 Lug Nuts Included 5/8"-18 Fine Thread Conical Tapered Seat
Key Measurements
| Key Dimension | Measurement |
|---|---|
| Thread Size | 5/8"-18 fine thread |
| Stud Size | 5/8" |
| Hex / Socket Size | 1-1/16" |
| Seat Style | Conical / tapered seat |
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 |
| Material / Finish | Zinc-plated steel |
| Application | Trailer wheels with matching 5/8"-18 studs and tapered seats |
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 trailer wheels with matching tapered lug nut seats.
Zinc-Plated Steel
Steel construction with zinc plating for added rust and corrosion resistance in normal trailer use.
8-Pack Lug Nut Set
Includes eight lug nuts for trailer wheel replacement, service, or spare hardware stock.
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 |
| Verification Notes | Confirm stud diameter, thread pitch, seat style, socket size, and torque requirement before ordering or installing. |
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, socket size, 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.
6-109X8, 5/8 cone lug nuts, 5/8-18 trailer lug nuts, trailer wheel lug nut set, 8 pack lug nuts, conical seat lug nuts, tapered seat lug nuts, 1-1/16 hex lug nuts, heavy duty trailer lug nuts, zinc plated trailer lug nuts, trailer wheel hardware, R&P Carriages trailer lug nuts
WE’RE HERE TO HELP
Not sure it fits?
Have your SKU or manufacturer part number, photos of the original part and mounting, and any critical measurements ready. Capacity, voltage, or bolt pattern can help too.
815-357-3292 · 270 E Jackson St · Seneca, IL 61360
CUSTOMER REVIEWS
Leave a Google review
Good people. Real trailer work.
Customer feedback summarized from Google and Yellow Pages. Dates are shown where available.
TRAILER PARTSGOOGLE
Ordered trailer repair parts repeatedly; praised fast service, careful packing, and accurate orders.
RV KEYSGOOGLE
Found the correct RV keys at a good price with free shipping; the keys worked as expected.
AXLE & LEAF SPRINGSGOOGLE
Needed an unusual axle and leaf-spring size; the team listened and helped him sort out the fit.
PARTS & SHIPPINGGOOGLE
Praised the OEM and aftermarket selection, discounts, quick shipping, and friendly parts staff.
CUSTOM AXLEGOOGLE
Got the axle he needed right away, set up with a custom spring perch.
WELDINGGOOGLE
Praised the polite staff and quality welding on a project.
GAS STRUTGOOGLE
Replacement struts brought a long-used door back to working order.
CUSTOM TRAILERGOOGLE
Had a trailer built to his needs at a fair price, then found parts for two other trailers in stock.
CUSTOMER SERVICEGOOGLE
Praised the customer service after working with R&P over several years.
GAS SHOCKGOOGLE
Found the gas shock he wanted at a good price with shipping included.
CARGO TIE-DOWNGOOGLE
Received swivel D-rings with backing plates and praised the price, correct order, and service.
PARTS DELIVERYGOOGLE
The right parts arrived the first time, with fast delivery and helpful staff.
PROJECT HELPYELLOW PAGES
Said project advice and prompt shipping helped finish a trailer project.
SHIPPINGYELLOW PAGES
Reported helpful service and fast shipment to Germany.
SUSPENSION KITYELLOW PAGES
Praised a suspension kit, fair pricing, and good parts.
TRAILER CORDYELLOW PAGES
Was pleased with a replacement trailer cord.
SERVICE & PARTSYELLOW PAGES
Noted dependable service and products across repeat visits.
AXLE INSTALLATIONYELLOW PAGES
Said the axle installation fit perfectly and thanked Josh and the crew.
HITCH REPLACEMENTYELLOW PAGES
Praised the crew’s professionalism during a difficult hitch replacement.
PRICE & SERVICEYELLOW PAGES
Liked the product, price, communication, and shipping.
LISTING INFORMATIONYELLOW PAGES
Said the product description explained what would work for the trailer.
PRODUCT & SHIPPINGYELLOW PAGES
Received the item as described with very fast shipping and plans to return.
COMMUNICATION & SHIPPINGYELLOW PAGES
Praised accurate description, quick shipping, and clear communication.
PRICE & PRODUCTYELLOW PAGES
Was happy with the product and its price.
SELLER EXPERIENCEYELLOW PAGES
Called it a pleasure doing business with R&P.
INSTALLATIONYELLOW PAGES
Was pleased with product quality, quick delivery, and an easy installation.
PRODUCTSYELLOW PAGES
Was enthusiastic about the products.
DURABILITYYELLOW PAGES
Was ready to install the product on every trailer they own.
REPEAT CUSTOMERYELLOW PAGES
Expected to buy again after a good experience.
INSTALLED PARTYELLOW PAGES
Reported that the newly installed parts were working perfectly.
REPEAT CUSTOMERYELLOW PAGES
Said things went well, as they had on previous visits.
COMMUNICATION & VALUEYELLOW PAGES
Praised clear communication and fair value.
TRANSACTIONYELLOW PAGES
Said the transaction went as expected.
PRICE & PACKAGINGYELLOW PAGES
Noted good value, careful packing, and fast shipping.
PROFESSIONAL SERVICEYELLOW PAGES
Found the team professional and easy to work with.
COMMUNICATION & SHIPPINGYELLOW PAGES
Praised fast shipping and good communication.
TEAMYELLOW PAGES
Shared appreciation for the owners and their company.
SHIPPINGYELLOW PAGES
Reported prompt shipping and said they would buy again.
CUSTOMER SERVICEYELLOW PAGES
Found R&P easy to deal with.
SERVICEYELLOW PAGES
Praised the people and the service.
FIT & SHIPPINGYELLOW PAGES
Reported a good fit, fair price, accurate listing, and quick shipping.
DELIVERYYELLOW PAGES
Received the order a day early and recommended the seller.
CUSTOM TRAILERYELLOW PAGES
Described a no-hassle, professional custom-trailer purchase.
TRAILER PURCHASEYELLOW PAGES
Praised a new trailer, custom additions, helpful staff, and clear pricing.
HUB COVERSYELLOW PAGES
Found the right hub covers quickly and got helpful maintenance advice.
AXLE HELPYELLOW PAGES
Said R&P helped their company get back on the road after an axle problem.
DUMP TRAILERYELLOW PAGES
Was happy with a dump-trailer purchase after comparing options.
BRAKES, DRUMS & SEALSYELLOW PAGES
Received clear help choosing brake assemblies and bearing seals, followed by fast shipping.
DUMP TRAILERYELLOW PAGES
Found a good deal on a 16-foot dump trailer and planned to return.
FRIENDLY SERVICEYELLOW PAGES
Thanked the staff for their patience and recommended the shop.
Showing 3 of 50
Need help with this part? Send photos, part numbers, and measurements. We’ll help you narrow it down.