Square U-Bolts built for Australian roads.
Hot-dip galvanised, coarse-thread square U-bolts sized from 3/8″ to 1″. Stocked in Australia and ready to bolt straight onto your trailer chassis or axle.
- Hot-dip galvanised finish for AU conditions
- Coarse UNC thread, square-bend design
- Dispatched from our Australian warehouse
- Trade & bulk quantities welcome
Square U-Bolt — Galvanised Steel
Six sizes, one job: hold it together
Every size below is matched to a UNC thread and a duty rating, so you can go straight from trailer type to part number.
Full technical specification
| Nominal size | Thread | Recommended application |
|---|---|---|
| 3/8″ | 3/8″-16 UNC | Light-duty trailers |
| 1/2″ | 1/2″-13 UNC | Light/medium trailers |
| 5/8″ | 5/8″-11 UNC | Medium/heavy trailers |
| 3/4″ | 3/4″-10 UNC | Heavy-duty trailers |
| 7/8″ | 7/8″-9 UNC | Heavy-duty applications |
| 1″ | 1″-8 UNC | Very heavy-duty applications |
Need a length, inside width, or material grade not shown here? Send us the chassis measurements via the contact form and we'll confirm the right part.
Fabricated for the job, not just the catalogue
Corrosion-ready finish
Hot-dip galvanised steel handles Australian heat, coastal air and unsealed roads without rusting through.
Fast Australian dispatch
Held in local stock and shipped from within Australia, so you're not waiting on an overseas container.
Trade & bulk friendly
Buying for a fleet, a build, or a workshop? Tell us the quantity and size mix for a trade quote.
Contact
Send us your trailer or chassis details and we'll confirm the right U-bolt size, thread and quantity for the job.