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Ark Trailer Main Rocker Arm Trailer Hanger for 2T 3T 4T Rocker Kits (SKU: RRAH45) Subtotal: $45.00
ARK Heavy Duty U-Bolt Square 45x160mm Long – 5/8″ Dia 80mm Thread for Trailer Axles (SKU: UB4515)
$14.00
Heavy-duty U-bolt for 45mm square trailer axles with 60mm wide leaf springs. 5/8″ thick, 160mm long, 80mm thread—built for serious load and outdoor conditions.
In stock
ITEM SPECIFICS
ARK Heavy Duty Trailer Axle U-Bolt – 45mm Square x 160mm Long (SKU: UB4515)
The ARK UB4515 is a heavy-duty U-bolt designed to provide strong, secure axle mounting for 45mm square trailer axles and 60mm wide leaf springs. With its 5/8” diameter and 160mm leg length, this bolt is built to handle serious loads and rough terrain with ease.
Key Features:
- Heavy-Duty 5/8″ Diameter: Extra thickness for strength under pressure and durability over time
- 160mm Arm Length: Long enough for thick saddles, brackets or oversized spring setups
- 80mm Threaded Section: Provides plenty of room for washers, plates, and adjustment
- Perfect Fit: Suits 45mm square axle and 60mm wide leaf spring setups
- Corrosion Resistant: Galvanised steel ideal for marine, coastal, and general outdoor use
- Includes: Heavy-duty nuts and washers (if sold as a kit)
Specifications:
- SKU: UB4515
- Axle Compatibility: 45mm square axle
- Leaf Spring Fit: 60mm wide
- Arm Length: 160mm
- Thread Length: 80mm
- Internal Width: 45mm
- Bolt Diameter: 5/8″ (16mm approx.)
- Finish: Galvanised steel
Whether you’re replacing your suspension hardware or building a new trailer setup from scratch, the UB4515 U-bolt gives you the strength, length, and reliability you need—backed by ARK’s trusted trailer hardware quality.
faq
FAQ
- Q: Will this fit a 50mm axle?
A: No, it’s made for 45mm square axles. For 50mm, you’ll need a wider U-bolt. - Q: Can I use this on a boat trailer?
A: Yes, the galvanised finish makes it suitable for marine and high-moisture environments. - Q: What’s the thread length?
A: 80mm of threading on each leg, allowing for flexibility in mounting. - Q: Do the nuts come with it?
A: That depends on the kit – many listings include nuts and washers, but check your pack contents to confirm.
Additional information
| Weight | 1.3 kg |
|---|---|
| Dimensions | 18 × 8 × 5 cm |
| Location | B-X-5 |
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Guide-Recommendation
Evaluation & Recommendation
This U-bolt is highly recommended for:
- Trailers using 45mm square axles and 60mm wide leaf springs
- Heavy-duty and off-road use, including tandem and utility trailers
- Marine or coastal environments needing anti-rust performance
May not suit:
- Round axles or axles larger than 45mm
- Standard duty applications needing only 1/2″ bolts
Installation Advice:
- Align U-bolt over axle and spring saddle, then fit through bracket holes
- Evenly torque both nuts to prevent spring misalignment
- Use anti-seize or galvanised-safe lubricant in high-salt areas
