Buy Nuts Online in Australia
Nut Selection — Quick Reference
AIMS stocks FULL nut range across metric + imperial + Whitworth standards + multiple grades + materials. Hex nuts + nyloc + flange + castle + Acme + coupling + thread inserts. Companion to bolt + screw fastening.
| Nut Type | Best For |
|---|---|
| Hex Nut (Standard) | General fastening — see hex bolts + nuts |
| Hex Lock Nut (Nyloc) | Vibration resistance — see hex lock nuts |
| Flange Nut | Built-in washer — see flanged nuts |
| Castle Nut (with Cotter Pin) | Critical applications — see castle nuts + castle nut guide |
| Coupling Nut (Long) | Connecting threaded rod — see coupling nuts |
| Captive Nut (Sheet Metal) | Held in sheet — see captive nuts |
| Wing Nut | Hand-tightenable |
| Square Nut | Slot + groove engagement |
| Cap Nut (Decorative) | Aesthetic + thread end protection |
| Rivet Nut / Nutsert | Threaded in sheet — see rivet nuts |
| Class 8 / Class 10 / Class 12 | Match to bolt grade |
| 304 / 316 Stainless | Marine + corrosion |
Critical: Match NUT GRADE to BOLT GRADE — Grade 8 nut on Grade 8 bolt (mixing = weaker grade governs joint). Match thread spec exactly. Brands: Bremick, Hobson, Inox World. Companion: fasteners, hex bolts + nuts, washers.
Nuts
AIMS Industrial stocks a full range of nut types beyond the standard hex nut — including nyloc insert lock nuts, dome (acorn) nuts, hex flange serrated nuts and wing nuts, in metric stainless steel (304 and 316), zinc-plated high tensile and mild steel finishes. This range covers applications from vibration-resistant locking to aesthetic finish fastening and hand-tightened assemblies.
Nyloc Lock Nuts
Nyloc (nylon insert) lock nuts resist loosening under vibration by compressing a nylon collar against the bolt thread. They are single-use — the nylon inserts are distorted during tightening and should not be reused in critical applications. The Nyloc Hex Nut Class 8 Zinc Plated is the standard high-tensile zinc option. For corrosive environments, the Metric Hex Nylon Insert Lock Nut 304 Stainless Steel and Metric Hex Nylon Insert Lock Nut 316 Stainless Steel provide stainless construction — 316 for marine and chloride-rich environments.
Dome Nuts
Dome nuts (acorn nuts) cap exposed bolt ends for aesthetic finish, safety and protection of the thread from damage and corrosion. The Metric Dome Nut 304 Stainless Steel and Metric Dome Nut 316 Stainless Steel are suited to food processing equipment, marine hardware, safety barriers and any exposed fastening where a rounded finish is required.
Flange & Wing Nuts
The Hex Flange Serrated Nut Class 8 Zinc Plated combines an integral serrated flange that bites into the mating surface to resist rotation under vibration — removing the need for a separate lock washer. The Metric Wing Nut 316 Stainless Steel is a hand-tightened nut suited to covers, guards and inspection panels that require frequent removal without tools.
For locking without a nylon insert, the Metric Hex Nut Grade 8 High Tensile Zinc Finish is a standard hex nut that can be used as a jam nut in double-nut locking arrangements — suitable where elevated temperatures would damage nylon inserts.
Shop the full range above, or contact our team for expert advice on the right product for your application or reach out if you need a quote. Fast dispatch from our Australian warehouse.
Australian Business, Local Supply: AIMS Industrial has supplied Australian industry since 1988.
Also see our Bolts, Washers Spring Washers, Dome Nuts, Captive Nuts and Fasteners ranges for complementary fastening products.