Buy Hex Bolts Online in Australia
Hex bolts are the general purpose bolt for structural, machinery and maintenance work. AIMS Industrial lists 56 hex bolts in metric coarse and fine thread, UNC, UNF, UNS and BSW, in carbon steel, 304 and 316 stainless, Bumax stainless and nylon, mostly from Hobson, with Inox World, Bumax, Champion and Bremick. Not sure what you need? Our hex bolt guide covers types, sizes and how to choose.
What's in the range
| Type | Listings | What is listed |
|---|---|---|
| Metric hex bolts, coarse thread | 11 | Class 8.8 in zinc, plain, hot-dip galvanised and galvanised (6 listings), Class 10.9 plain and zinc plated (2), Class 4.6 zinc plated (1), and 304 and 316 stainless (2). |
| Metric fine thread hex bolts | 4 | Class 8.8 and Class 10.9, plain and zinc plated. |
| Metric fine dome hex track bolts | 2 | Grade 9 plain, including a pack of 100 in M14 x 35 mm. |
| UNC hex bolts | 12 | Grade 5 and Grade 8 in plain and zinc finishes (10 listings), plus 304 and 316 stainless (2). |
| UNF hex bolts | 11 | Grade 5 and Grade 8 in plain and zinc finishes. |
| UNS and BSW hex bolts | 3 | A UNS Grade 8 zinc bolt and two BSW bolts (plain, and zinc plated 1/2 inch x 3-1/2 inch in packs of 100). |
| Nylon hex bolts | 2 | UNC and metric, natural nylon. |
| Bumax stainless high tensile | 3 | Bumax 8.8 and 10.9 stainless steel hex bolts, plus an M30 x 115 mm Bumax 8.8 listing. |
| Stainless flange bolt | 1 | Hex serrated flange bolt in A2 (304) stainless, from Inox World. |
| Champion kits and refills | 7 | The CA200 hex flange set screw assortment kit and six assortment refills for hex bolts, hex flange bolts, UNC and UNF high tensile bolts and UNC set screws. |
That is 56 listings in total. Many listings carry a range of sizes as variants, so check the listing for diameters, lengths and pack quantities.
Choosing a hex bolt
Start with the thread. Metric coarse is the usual choice for new work, metric fine suits applications that call for it, UNC and UNF are for imperial equipment, and BSW is for older British-pattern machinery. If you are matching an existing bolt, check the thread with a gauge rather than going by the head size alone.
Then choose the strength and the finish. Metric Class 4.6 is for light duty, Class 8.8 is the common general purpose class, and Class 10.9 is used where more strength is needed. UNC and UNF Grade 5 and Grade 8 follow the same idea in imperial. For finish, plain steel suits indoor and oiled applications, zinc plating adds light corrosion protection, and hot-dip galvanised suits outdoor use. Stainless suits wet or corrosive conditions, with 316 the usual step up from 304 near salt water and chemicals. Bumax is a high tensile stainless bolt for jobs where plain stainless is not strong enough. Nylon bolts are for light, non-metallic jobs.
Match the nut and washer to the bolt, and avoid mixing stainless and carbon steel fasteners in a wet joint. Use our bolt grade chart to read the markings and the metric bolt torque chart for tightening.
Always check the data sheet. Confirm the property class, thread, finish and pack size on the listing before you order for a structural or safety critical joint.
Related ranges
See bolts, hex bolts and nuts, hex set bolts, hex head flanged bolts, purlin bolts and nuts, cup head bolts and nuts, hex nuts, washers, spring washers and fasteners. Brands: Hobson, Inox World, Bumax, Champion and Bremick.
Order from AIMS Industrial
Need a specific size, grade or pack quantity? Call us on (02) 9773 0122, contact our team or request a quote. We have supplied Australian industry since 1988 and can help with sizes, nuts, washers and quantities.
Hex bolt FAQs
What hex bolts does AIMS list?
We list 56 hex bolts: metric coarse and fine thread, UNC, UNF, UNS and BSW, in carbon steel, 304 and 316 stainless, Bumax stainless and nylon, plus Champion assortment kits and refills.
What is the difference between UNC and UNF hex bolts?
UNC is the coarse imperial thread and UNF is the fine imperial thread. They are not interchangeable, so check the thread of the bolt you are replacing with a thread gauge.
Which metric class should I choose?
Class 4.6 is light duty, Class 8.8 is the common general purpose class and Class 10.9 is used where more strength is needed. Match the nut to the bolt, and check the data sheet for structural or safety critical joints.
Should I use zinc plated, galvanised or stainless?
Zinc plating adds light corrosion protection for indoor and mild conditions. Hot-dip galvanised suits outdoor use. Stainless suits wet or corrosive conditions, and 316 is the usual choice near salt water or chemicals. Check the listing for the finish and material.
What is Bumax?
Bumax hex bolts are stainless steel bolts sold in 8.8 and 10.9 strength levels, for jobs where standard stainless is not strong enough. Check the data sheet for the full specification.
Where are fully threaded hex bolts and flanged bolts?
Fully threaded bolts are in hex set bolts, flanged bolts are in hex head flanged bolts and purlin bolts are in purlin bolts and nuts.