At a Glance
- SKU: 4738-28
PRODUCT INFORMATION
Product Details
Trailer Wheel Stud / Rockwell-Style 10K Hub & Drum Hardware
4738-28 Replacement Wheel Stud – 5/8"-18 Thread – 2.75" Usable Length – 0.648" Knurl
Heavy-duty press-in replacement wheel stud for compatible Rockwell-style 10K trailer hub and one-piece drum applications where the thread size, knurl diameter, and stud length match.
Part Number: 4738-28 5/8"-18 Thread 0.648" Knurl
Overview
This 4738-28 replacement wheel stud is built for heavy-duty trailer hub and drum service where a 5/8"-18 press-in stud with a 0.648" knurl is required. It is commonly used with Rockwell-style 10K one-piece drum assemblies, but stud dimensions must be verified before ordering or installation.
R&P Service Insight
Wheel studs are small components with a major job. On heavy trailer axles, the correct thread size, knurl diameter, and usable length all matter for wheel retention and proper hub or drum fit.
- Knurl Match: The 0.648" knurl must match the hub or drum hole so the stud can seat securely when pressed in.
- Thread Match: The 5/8"-18 thread must match the wheel nut used on the trailer assembly.
- Length Check: Verify usable length and thread engagement before installation, especially when replacing studs on 10K and larger trailer axle systems.
R&P Knowledge Hub
Compatibility: Intended for compatible Rockwell-style 10K trailer hub and one-piece drum applications where the listed dimensions match the existing stud.
Vehicle / System Fit: Heavy-duty trailer hub and drum assemblies using a 5/8"-18 press-in wheel stud.
Installation Notes: Always verify knurl diameter, thread size, usable length, thread length, and hub or drum hole condition before pressing in a new stud.
Performance Insight: A press-in wheel stud relies on the knurled shoulder locking tightly into the hub or drum. A loose or mismatched knurl can compromise seating and retention.
Brand & Fitment Note
Selling Brand: R&P Carriages replacement component.
Application Reference: Rockwell names or Rockwell-style references in this listing describe application style and compatibility target only where the listed measurements match.
What This Means: This listing is for one replacement wheel stud, not a guaranteed OEM-branded item unless specifically stated and verified.
Before Ordering: Verify your existing wheel stud dimensions, hub or drum style, knurl diameter, thread size, and required length before installation.
R&P Repair Insight
When replacing trailer wheel studs, do not rely on axle capacity alone. Similar heavy-duty hub and drum assemblies can use different knurl sizes, thread lengths, and shoulder dimensions.
- Measure the Old Stud: Compare thread size, thread length, usable length, overall length, and knurl diameter before ordering.
- Inspect the Bore: A damaged, enlarged, or worn stud hole may prevent the new stud from locking correctly.
- Press-In Fit: Install using proper press-in service methods. Do not assume the wheel nut alone is the correct installation tool.
Features
5/8"-18 Thread Size
Matches heavy-duty trailer wheel nut applications requiring a 5/8"-18 threaded wheel stud.
0.648" Knurl Diameter
Designed for press-in hub or drum applications where a 0.648" knurled shoulder is required.
2.75" Usable Length
Provides the listed usable stud length for compatible 10K trailer hub and drum assemblies.
Heavy-Duty Press-In Design
Press-in style replacement stud for trailer hub and one-piece drum service where measurements match.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 4738-28 |
| Brand | R&P Carriages replacement component |
| Product Type | Press-in trailer wheel stud |
| Application | Heavy-duty trailer hub and drum assemblies |
| Thread Size | 5/8"-18 |
| Overall Length | 3.136" |
| Usable Length | 2.75" |
| Thread Length | 2.166" |
| Insert Length | 0.565" |
| Knurl Diameter | 0.648" |
| Head Diameter | 0.394" |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Heavy-duty trailer axle hub and drum system |
| Primary Fit | Commonly used with Rockwell-style 10K one-piece drum assemblies where dimensions match |
| Secondary Fit | Other compatible trailer hub or drum applications requiring the same stud dimensions |
| Notes | Verify thread size, knurl diameter, usable length, thread length, and hub or drum hole size before ordering or installing. |
Included Components
| Quantity | Item |
|---|---|
| 1 | Replacement wheel stud, part number 4738-28 |
Verify all measurements, thread size, knurl diameter, usable length, hub or drum hole condition, and wheel nut compatibility before installation. Rockwell-style references in this listing describe application fitment only and do not identify this item as a guaranteed OEM-branded component.
4738-28 wheel stud, 5/8-18 trailer wheel stud, Rockwell style wheel stud, 10K trailer hub stud, 10K trailer drum stud, 0.648 knurl wheel stud, press in trailer wheel stud, heavy duty trailer wheel stud, replacement trailer hub stud, Rockwell one piece drum wheel stud
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