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Trailer Galvanised U Bolts Kit for 39mm Round Axle with Fish Plates & Axle Pads – ARK Set (SKU: JIA011)
$40.00
Heavy-duty galvanised U-bolt kit designed for 39mm round trailer axles. Includes U-bolts, fish plates, axle pads, and nyloc nuts for secure suspension mounting.
In stock
ARK Galvanised U-Bolt Kit for 39mm Round Axles (SKU: JIA011) is the ideal hardware solution for securely mounting round trailer axles. Designed with durability and reliability in mind, this set includes 4 x galvanised U-bolts, 2 x axle pads, and 2 x fish plates—perfect for suspension upgrades or replacements on trailers, campers, and caravans.
Engineered for Strength and Simplicity
- Fits 39mm Round Axles: Precisely sized for round axle applications commonly found in light to medium-duty trailers.
- Complete Mounting Set: Includes everything you need—U-bolts, pads, fish plates, and nyloc nuts—for secure axle-to-spring connections.
- Durable Galvanised Finish: Provides excellent corrosion resistance for long-lasting performance in harsh outdoor conditions.
- Heavy-Duty Fish Plates: 90mm long x 95mm wide with 20mm bolt holes and 39x45mm spacing, ensuring a tight and reliable clamping system.
Kit Specifications:
- U-Bolts: 39mm round | 60mm arm length | 60mm thread length | ½” diameter | Galvanised with nyloc nuts included
- Axle Pads: 40mm wide | 40mm long | 7mm thick | 16mm centre hole
- Fish Plates: 90mm long | 95mm wide | 7mm thick | 20mm bolt hole | 39x45mm bolt spacing
Whether you’re assembling a new trailer or giving your old rig some love, this ARK U-bolt kit is the perfect go-to solution. Built tough, easy to install, and made to endure the dust, mud, and salt of the Aussie outdoors.
Simple, strong, and reliable—just like a good mate on the road.
Frequently Asked Questions
Will this fit a 40mm axle?
No, this kit is specifically made for 39mm round axles. For square or larger axles, check our other U-bolt kits.
Is it suitable for use in coastal or marine environments?
Yes. The galvanised coating offers strong protection against rust, ideal for use near saltwater or in wet conditions.
What comes in the kit?
The kit includes 4 U-bolts, 2 axle pads, 2 fish plates, and nyloc nuts.
Can I install this myself?
Yes, it’s a straightforward bolt-on installation. Just align the components and tighten the nuts evenly.
Will the nyloc nuts hold under vibration?
Yes, nyloc nuts are specifically designed to resist loosening due to vibration and road movement.
Evaluation & Recommendation
Is this U-bolt kit right for you?
- ✔️ You’re mounting or replacing 39mm round trailer axles.
- ✔️ You need a corrosion-resistant solution that can withstand outdoor exposure.
- ✔️ You want a kit that includes everything for a complete install—no missing parts.
Ideal for campers, tradies, and DIYers handling axle maintenance, this set will have your trailer sorted with minimal fuss. If you’re unsure about axle sizing or compatibility, just get in touch—we’ll help you figure it out fast.
Installation Tips:
- Position your axle and spring on the trailer frame.
- Place the axle pads on top of the spring to stabilise the round axle.
- Align the fish plates under the axle and insert the U-bolts.
- Thread the nyloc nuts onto the bolts and tighten evenly.
- Check torque after your first few trips for peace of mind.
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