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| 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. |
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Silver zinc plated metal round U-bolt for compatible trailer axle and suspension applications where a 3" inside width, 9/16" diameter, 7" long U-bolt is required.
| Specification | Detail |
|---|---|
| SKU | UB-R303-ZP |
| Product Type | Round trailer axle U-bolt |
| Size | 3" x 9/16" diameter x 7" long |
| Thread Type | Fine thread |
| Threads Per Inch | 18 TPI |
| Grade | SAE Grade 5 |
| Material / Finish | Metal, zinc plated |
| Color | Silver |
| Quantity Included | 1 U-bolt |
| Category | Details |
|---|---|
| System | Trailer axle and suspension hardware |
| Application Reference | Fits compatible 7000# applications where measurements and hardware match |
| Matching Thread | 9/16"-18 fine thread |
| Related Hardware Reference | UBN-9C / TP-4 reference where correct for the application |
| Fitment Method | Verify axle tube size, U-bolt width, bolt diameter, length, plate fitment, and nut thread before ordering |
| Feature | Buyer Benefit |
|---|---|
| Zinc Plated Finish | Silver finish provides corrosion-resistant surface protection for trailer hardware use |
| 9/16"-18 Fine Thread | Matches compatible fine-thread nuts and suspension hardware |
| SAE Grade 5 | Built for heavier-duty trailer suspension fastening applications where Grade 5 hardware is specified |
| 3" x 7" Size | Useful for compatible axle tube and U-bolt plate setups requiring this measurement |
This listing is for one round zinc plated U-bolt, SKU UB-R303-ZP. The U-bolt measures 3" x 9/16" diameter x 7" long and uses 9/16"-18 fine thread. It is SAE Grade 5 hardware with a silver zinc plated finish for compatible trailer axle and suspension applications.
U-bolts must be matched by measurement and thread, not by appearance alone. Before replacing axle hardware, confirm the complete suspension stack matches this 3" width, 9/16" diameter, 7" length, and 18 TPI thread requirement.
Compatibility: Use for compatible 7000# trailer axle applications where the existing U-bolt dimensions, thread, and related hardware match.
Vehicle / System Fit: Trailer axle and suspension hardware applications using a round 3" x 9/16" diameter x 7" long U-bolt.
Installation Notes: Verify axle tube size, U-bolt plate, nut thread, and length before installation. Replace worn or mismatched suspension hardware as needed.
Performance Insight: Correct U-bolt size and thread engagement are critical for proper axle clamping and suspension hardware alignment.
Selling Brand: R&P Carriages
Application Reference: 7000# application references are fitment guides only. Final fit depends on matching the U-bolt measurements and related suspension hardware.
What This Means: This listing is for one R&P Carriages round zinc plated U-bolt, not a complete U-bolt kit unless specifically stated.
Before Ordering: Verify measurements, thread pitch, axle tube size, plate compatibility, nut compatibility, and included components before installation.
When servicing trailer suspension hardware, U-bolts should be selected by exact measurement and thread specification. A mismatch in diameter, length, thread pitch, or plate fit can prevent proper installation.
Designed for compatible round trailer axle and suspension fastening applications where this size is required.
Fine-thread 9/16" diameter hardware with 18 threads per inch for matching compatible nuts.
Grade 5 specification for compatible trailer suspension applications requiring this hardware grade.
Zinc plated metal construction with a silver finish for clean appearance and surface protection.
| Quantity | Item |
|---|---|
| 1 | Round zinc plated U-bolt, 3" x 9/16" diameter x 7" long, 9/16"-18 fine thread |
| Not Included | Nuts, plates, washers, and additional suspension hardware unless separately selected or stated |
|
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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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