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2x ARK Galvanised Square U Bolts 60x135mm Arm Length with 50mm Thread for Trailer Use (SKU: MRUB4G)
$20.90
Heavy-duty galvanised U bolts (pair) with 60mm internal width, 135mm leg length, and 50mm threaded section. Ideal for trailer chassis and deep bracket mounts.
Out of stock
ARK MRUB4G Galvanised U Bolts are extra-long, square-shaped bolts designed for trailer and caravan mounting tasks that require deep reach and high clamping power. With a 60mm internal width and a full 135mm leg length, these U bolts are ideal for larger chassis beams, multi-layer clamping setups, and oversized suspension components.
Each U bolt features a 50mm threaded section and a rugged hot-dipped galvanised finish, providing excellent corrosion resistance for outdoor and marine use. Manufactured from 1/2″ diameter steel, they’re tough enough to handle repeated stress and vibration under towing conditions.
Specifications:
- Internal width: 60mm
- Arm length: 135mm
- Thread length: 50mm
- Thread diameter: 1/2″ (approx. 12.7mm)
- Shape: Square U bolt
- Finish: Galvanised steel
- Quantity: 2 bolts per set (pair)
Perfect for securing heavy brackets, axle plates, U-bolt fish plates, or frame extensions where standard-length bolts just won’t reach.
FAQ
- Q: What type of trailers or frames is this suitable for?
- A: These U bolts are great for trailers with large chassis sections or thick mounting assemblies, including heavy-duty off-road trailers and marine builds.
- Q: What size beam does this fit?
- A: It fits beams approximately 60mm wide, and with 135mm arms, it accommodates deeper frames or stacked fittings.
- Q: Is this corrosion-resistant?
- A: Yes, the hot-dipped galvanised finish offers strong protection against rust and harsh environments.
- Q: Does it include washers and nuts?
- A: No, this listing includes only the U bolts. Use with standard 1/2″ trailer mounting hardware.
| Weight | 0.6 kg |
|---|---|
| Dimensions | 15 × 9 × 5 cm |
| Location | A-1-X |
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Evaluation & Recommendation
The ARK MRUB4G U bolts are ideal for larger structural applications where deeper bolt penetration is required. Their 135mm length allows you to clamp over thicker components, including multiple layers of steel or frame reinforcements.
Recommended for:
- Heavy-duty trailer suspension setups
- Boat trailers or marine trailer frames
- Stacked brackets or axle spring seat installs
- Chassis extensions and multi-plate mounting
Installation Tips:
- Use anti-vibration washers or nyloc nuts for towing security
- Tighten evenly across both threads to prevent bolt twist
- Grease threads lightly if used in marine environments
Still unsure which U bolt length you need? Send us your frame and plate dimensions—we’ll help you select the best fit from our full U bolt range.
