Set of 5 Drive-In Trailer Wheel Studs 1/2"-20 x 2" Fits Ranger / UFP Hubs 33038U-5
Set of five drive-in trailer wheel studs for compatible Ranger and UFP-style trailer hubs. Commonly found on boat trailer hub applications and useful for replacing worn, stripped, rusted, missing, or damaged studs during hub, wheel, brake, or bearing service.
Overview
This 33038U-5 wheel stud set includes five drive-in / press-in trailer wheel studs for compatible Ranger and UFP-style boat trailer hubs. Each stud uses 1/2"-20 threads, 2" overall length, 0.25" spline length, 0.65" base diameter, and 0.562" spline diameter. This set is intended for hubs that use matching press-fit studs; verify all dimensions against your original stud before installation.
R&P Service Insight
Wheel studs are critical wheel-retention hardware. A damaged or loose stud can prevent proper lug nut torque and may create a wheel safety issue, especially on trailers exposed to water, road salt, and repeated loading cycles.
- Thread Damage: Replace studs with stripped, stretched, cross-threaded, or badly corroded threads.
- Press-Fit Security: The spline diameter must match the hub bore so the stud locks into the hub correctly.
- Boat Trailer Use: Water exposure can accelerate corrosion, making wheel stud inspection important during hub and bearing service.
R&P Knowledge Hub
Compatibility: Fits compatible Ranger / UFP trailer hubs that use a drive-in wheel stud with 1/2"-20 thread, 2" overall length, 0.25" spline length, 0.65" base, and 0.562" spline diameter.
Vehicle / System Fit: Commonly found on boat trailer hub applications using UFP-style hub hardware.
Installation Notes: Wheel studs are not universal by thread size alone. Match the thread pitch, overall length, spline / knurl diameter, spline length, base diameter, and hub bore before pressing the stud into the hub.
Performance Insight: A properly matched drive-in stud should seat squarely in the hub and resist spinning during lug nut torque. Incorrect spline sizing can lead to stud spin, inaccurate torque, or hub damage.
Brand & Fitment Note
Selling Brand: R&P Carriages
Application Reference: Ranger and UFP names are used as compatibility, hub-style, and application references only for trailer hubs where the original stud dimensions match.
What This Means: This listing is for a five-piece replacement wheel stud set for compatible Ranger / UFP-style trailer hubs. It is not a universal wheel stud set for every 1/2"-20 trailer hub.
Before Ordering: Compare your original stud to the measurements below, especially spline / knurl diameter and overall length. If your hub uses a different spline diameter, base size, or stud length, this part may not fit correctly.
R&P Repair Insight
Drive-in wheel studs are identified by their full measurement profile, not just the lug nut thread size. The most common fitment mistake is matching the 1/2"-20 thread while overlooking the spline diameter that holds the stud in the hub.
- Spline Diameter Check: This stud is listed with a 0.562" spline diameter. Compare against your original stud and hub bore.
- Length Check: This stud is listed as 2" long. Confirm proper lug nut engagement without bottoming out or interference.
- Press-In Check: The stud should press in squarely and seat firmly. Do not force a mismatched stud into the hub with the lug nut.
Features
Drive-In / Press-In Design
Designed for compatible trailer hubs that use press-fit wheel studs rather than threaded-in studs.
1/2"-20 Threads
Common fine-thread wheel stud configuration for matching trailer lug nut and hub applications.
0.562" Spline Diameter
Listed spline / knurl diameter helps confirm whether the stud will properly retain in the hub bore.
Five-Stud Service Set
Includes five individual studs for hub service, repair, or multi-stud replacement work.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 33038U-5 |
| Brand | R&P Carriages |
| Product Type | Drive-in / press-in trailer wheel stud set |
| Application | Trailer hub wheel stud replacement |
| Thread Size | 1/2"-20 |
| Overall Length | 2" |
| Spline Length | 0.25" |
| Base Diameter | 0.65" |
| Spline / Knurl Diameter | 0.562" |
| Quantity | 5 wheel studs |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Trailer hub / wheel mounting hardware |
| Primary Fit | Compatible Ranger / UFP-style trailer hubs using matching 1/2"-20 x 2" drive-in studs |
| Common Application | Boat trailer hub service and wheel stud replacement where original dimensions match |
| Notes | Confirm thread size, overall length, spline / knurl diameter, spline length, base diameter, hub bore, and lug nut compatibility before installation. Fitment is measurement-based. |
Included Components
| Quantity | Item |
|---|---|
| 5 | Drive-in / press-in trailer wheel studs |
| Not included | Lug nuts, hub, wheel, bearings, seals, brake parts, or installation tools |
