Wheel Studs and Nuts
Caravan and Trailer Wheel Studs and Lug Nuts
Industrial-grade sourcing guide for high-tensile caravan and trailer wheel studs ranging from 7/16-inch Holden UNF up to heavy-duty 7/8-inch configurations. This engineering section provides verified technical specifications, mechanical hardware requirements, and compatible wheel-fastening solutions—including standard lug nuts and specialised mag wheel nuts—engineered to meet strict Australian towing and safety standards.
Engineering Overview & Hardware Range
Wheel studs are critical safety components manufactured from high-tensile steel to withstand severe shear stress, cyclic loading, and demanding road corrugations. Ensuring exact mechanical matching between the hub, stud knurl, and wheel rim is vital to vehicle safety and prevents catastrophic on-road failures.
Available Fastener Classifications
- 7/16″ Holden UNF Studs: The historical standard for light-duty domestic trailers and marine applications.
- 1/2″ Ford UNF Studs: The industry baseline for medium-duty trailers, tandem caravans, and standard braking hubs.
- 9/16″ & Metric Alternates: Heavy-duty applications, frequently aligned with LandCruiser hub patterns.
- Up to 7/8″ Heavy Transport Studs: Built for commercial-grade plant trailers, low-loaders, and maximum-capacity towing.
- Fastener Accessories: Full stock integration of standard tapered lug nuts, open/closed-end variations, and deep-seat mag wheel nuts.
Authoritative Reference Links
All trailer modifications, hub replacements, and wheel assemblies must comply with Australian federal transport directives and structural steel regulations:
- Review legal design criteria for trailers via the Australian Vehicle Standards Bulletin 1 (VSB1).
- Consult the heavy vehicle mechanical parameters outlined by the National Transport Commission (NTC).
- Verify high-tensile mechanical fastener testing standards through Standards Australia.












