– · High-Tensile Steel Round and Quare U-Bolts
Transport U-Bolts built for full-load Australian roads.
Precision-formed suspension fasteners for leaf springs, trailer axles and commercial fleets. Round and square U-bolts — manufactured at our Truganina, VIC hub and supplied nationwide to Melbourne, Sydney, Brisbane and Perth.
FIG. 01 — STANDARD SUSPENSION U-BOLT, DIMENSIONS VARY BY APPLICATION
Product Range
Our high-tensile U-bolt categories
Three core profiles covering round pipe mounts, structural square-section work, and corrosion-resistant marine applications.
Round U-Bolts
Standard round-bend profile for pipe mounts, leaf springs and general trailer axle clamping.
View Range →
Square U-Bolts
Square-bend profile built for structural framing, chassis rails and square-section axle beams.
View Range →
Stainless Steel Marine Boat U-Bolts
Stainless steel U-Bolts for saltwater exposure — boat trailers, rigging and deck fittings.
View Range →Where We Operate
One main hub. National supply.
Manufactured and stocked at our Truganina, VIC hub, and supplied to workshops and fleets across Melbourne, Sydney, Brisbane and Perth.
Truganina, VIC 3029
Manufacturing, stock holding and national dispatch for all U-bolt categories and custom orders.
Galvanized U-Bolts built to handle full-load Australian road conditions.Melbourne
Metro and regional VIC workshops, fleets and trailer manufacturers.
Sydney
NSW metro trailer manufacturers and heavy-haulage clients.
Brisbane
Queensland transport, agricultural and regional freight fleets.
Perth
WA workshops and commercial fleets, supplied via national freight.
Why Workshops Choose Kap
Fasteners engineered to hold, not just fit.
High-Tensile Steel
Formed from certified high-tensile stock, tested for full-load transport conditions.
3/8″– 3/4″ Thread Range
One supplier covers light trailers through to heavy commercial axle assemblies.
AU Standards Compliant
Manufactured to strict Australian transport and fabrication standards.
Corrosion Protection
Zinc-plated and galvanised finishes available for coastal and rural fleet conditions.
Custom Drop Lengths
Non-standard leaf spring and axle configurations formed to your workshop's spec.
National Turnaround
Our Truganina hub means faster turnaround, with freight lines running to every state capital.
Product Data
Common thread & drop-length reference
Starting point for standard fleet applications — custom dimensions available on request.
| Nominal size | Thread | Recommended application |
|---|---|---|
| 3/8″ | 3/8″-16 UNC | Light trailer, box trailer |
| 1/2″ | 1/2″-13 UNC | Light/medium trailers |
| 1/5″ | 5/8″-11 UNC | Medium/heavy trailers |
| 3/4″ | 3/4″-10 UNC | Heavy-duty trailers |
Get In Touch
Talk to the hub nearest your workshop
Send your specs — thread size, drop length, quantity — and we'll quote against current stock at our Truganina hub, with freight available to Melbourne, Sydney, Brisbane and Perth.
- Monday09:00 – 18:00
- Tuesday09:00 – 18:00
- Wednesday09:00 – 18:00
- Thursday09:00 – 18:00
- Friday09:00 – 18:00