2x TROJAN M12 Square Trailer U Bolts 51x120mm Galvanised for 50mm Round Axle (SKU: 271070)

These TROJAN M12 Square U Bolts (2x) are purpose-built for trailer applications requiring secure mounting of 50mm round axles. Manufactured from durable steel and hot-dip galvanised, these U bolts provide high corrosion resistance, making them ideal for use in coastal areas, wet conditions, or off-road environments.

Key Features:

• Dimensions: 51mm internal width x 120mm arm length x 12mm diameter
• Thread Length: 40mm for flexible fitting options
• Material: Galvanised steel for maximum corrosion resistance
• Application: Designed to secure 50mm round trailer axles
• Installation: Easy to install with included nuts and washers

Whether you’re replacing old rusted U bolts or setting up a new trailer axle assembly, these M12 U Bolts are a reliable, cost-effective solution that ensures safety and stability on the road. Compatible with various trailer brands and custom setups, they offer a solid grip to prevent axle movement or misalignment during towing.

Ideal for:

• Box trailers
• Boat trailers
• Utility trailers
• Farm carts and general towing applications

Each pack includes two U bolts, along with matching nyloc nuts and washers, ensuring you’re ready for a quick and stable installation right out of the box.

Frequently Asked Questions

Evaluation & Recommendation

This U bolt set is perfect for DIYers and trailer repairers needing reliable axle mounting. If you’re working with a 50mm round axle, these M12 galvanised bolts provide the strength and corrosion resistance required for both casual and frequent towing.

Recommended For:

• Customers needing replacement parts for worn or rusted axle U bolts
• Trailer owners upgrading axle mounts or refurbishing old frames
• Boat trailer users exposed to wet and coastal environments

If your axle is a square profile, or your measurements differ, contact us — we’ll help find the correct size U bolt or create a custom solution to match your setup.

Installation Tips:

• Ensure all mounting surfaces are clean before installation
• Use threadlocker for extra vibration protection
• Torque evenly across both sides to avoid axle tilt