Match the part number, measurements and connection points that apply to your trailer.
| Hub Face | Measure hub face to hub face. |
|---|---|
| Spring Center | Measure mounting centers and confirm perch configuration. |
| Capacity | Match the required axle rating. |
| Brakes | Confirm brake type and flange configuration. |
Round trailer axle U-bolt for compatible 3,500 lb axle applications using a 2-3/8" round axle tube. Verify axle tube size, U-bolt length, thread pitch, and mounting plate fit before ordering.
This UB-R200 round trailer axle U-bolt is sized for 3,500 lb axle applications where a 2-3/8" inside diameter round U-bolt is required. It measures 5-1/4" long, uses 1/2" diameter material, and has 2" long 1/2"-20 fine threads for compatible trailer suspension clamp assemblies.
Axle U-bolts are critical suspension clamp hardware. The right U-bolt must match the axle tube diameter, spring plate hole spacing, thread pitch, and usable length for the suspension stack being serviced.
Compatibility: Fits compatible 3,500 lb trailer axle setups where a 2-3/8" round U-bolt with the listed measurements is required.
Vehicle / System Fit: Trailer axle and leaf spring suspension hardware for round axle applications.
Installation Notes: Verify inside diameter, overall length, thread length, thread size, and mounting plate hole spacing before buying or installing.
Performance Insight: Properly matched U-bolts help secure the axle tube to the suspension assembly. Incorrect size or thread mismatch can prevent proper clamp fit.
Selling Brand: R&P Carriages listing; manufacturer brand not specified in the supplied product details.
Application Reference: 3,500 lb axle language describes the listed trailer axle application where the axle diameter and hardware measurements match.
What This Means: This listing is for a UB-R200 round trailer axle U-bolt, not a guaranteed OEM-branded component unless specifically stated and verified.
Before Ordering: Verify axle tube diameter, U-bolt length, thread pitch, mounting plate fit, and included components before installation.
The most common U-bolt ordering mistake is matching only the axle capacity and missing one of the measurements. Compare your existing hardware before ordering, especially if the trailer has been modified or previously repaired.
Designed for trailer axle suspension applications requiring a round U-bolt with a 2-3/8" inside diameter.
Listed to fit 3,500 lb axles where the axle tube size and mounting hardware dimensions match.
Uses 1/2"-20 fine threads with a listed 2" thread length for compatible hardware setups.
Overall length is listed as 5-1/4", making measurement verification important before ordering.
| Specification | Detail |
|---|---|
| Part Number | UB-R200 |
| Brand | R&P Carriages listing; manufacturer not specified |
| Product Type | Round trailer axle U-bolt |
| Application | Trailer axle / leaf spring suspension hardware |
| Inside Diameter | 2-3/8" |
| Length | 5-1/4" |
| Diameter | 1/2" |
| Thread Length | 2" |
| Thread Size | 1/2"-20 fine thread |
| Listed Axle Fit | 3,500 lb axles |
| Category | Details |
|---|---|
| Vehicle / System | Trailer axle suspension hardware |
| Primary Fit | Compatible 3,500 lb trailer axles using 2-3/8" round axle tubes |
| Required Match | 2-3/8" I.D., 5-1/4" length, 1/2" diameter, 2" long threads, 1/2"-20 fine thread |
| Notes | Confirm axle tube diameter, U-bolt length, mounting plate hole spacing, thread size, and suspension layout before ordering. |
| Quantity | Item |
|---|---|
| 1 per quantity ordered | UB-R200 round trailer axle U-bolt |
| Not specified as included | Nuts, washers, tie plate, springs, axle, and additional mounting hardware |
Selected from R&P customer feedback for Trailer Axle / Running Gear products and related trailer service.
“Got me the axle I needed right away with custom spring perch setting.”
“Had a trailer made to my needs.ken was able to get it done and at a price that was very acceptable.i have bought parts there for 2 other trailers and always in stock”
“Quality work. Staff is polite. Great job welding a project for me. Didn't even want to charge me, so I bought them a case of Corona. They were ecstatic. I ever need a welding or like that R&P Carriages is #1 !!!!!”
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