Hex bolts are bolts with a six-sided head, used with a nut to join steel, timber and other parts. They are sold as part-threaded bolts, and as fully threaded hex set screws, in a range of strength classes and finishes.
Linkworld supplies metric hex bolts from M6 to M48 in carbon steel, alloy steel and stainless steel, with zinc, hot-dip galvanised, black and Dacromet finishes. They can be made to ISO, DIN or AS/NZS dimensions, or to your drawing, and we pack in bulk cartons or in your own branded packs.
Hex Bolt Specifications
| Specification | Configuration |
|---|---|
| Product | Hex head bolt (part thread) and hex set screw (full thread) |
| Standards | AS/NZS 1110.1, ISO 4014 / ISO 4017, DIN 931 / DIN 933 |
| Sizes | M6 to M48, metric coarse; fine thread on request |
| Carbon and alloy steel | Class 4.6, 8.8 and 10.9 |
| Stainless steel | 304 (A2) and 316 (A4) |
| Finish | Zinc plated, hot-dip galvanised, black or Dacromet |
| Packing | Bulk cartons, own-brand boxes, buckets and small packs |
Other sizes and finishes can be made to drawing or sample.
Where Hex Bolts Are Used
- Steel fabrication brackets, frames and machinery
- Timber construction with washers and nuts in bolted timber joints
- Trailers and vehicles chassis and body fixings
- Farm and rural equipment gates, posts and implements
- Plant maintenance replacement bolts for equipment
Choosing Hex Bolts
- Part or full thread: hex bolts have a plain shank for shear joints; hex set screws are threaded to the head for clamping and tapped holes.
- Strength class: 4.6 for general work, 8.8 for high tensile use, 10.9 for higher-strength machinery joints.
- Finish: zinc for indoor use, hot-dip galvanised for outdoor and structural work, stainless steel for coastal or wet areas.
- Standard: state AS/NZS, ISO or DIN so head size and thread length match your range.
Bolts for structural steel connections are a separate product to AS/NZS 1252 and should be ordered to that standard.
Common Purchasing Mistakes
Mixing bolts and set screws. Part-threaded bolts and fully threaded set screws have different uses. State which one you need.
Leaving out the strength class. A 4.6 and an 8.8 bolt look the same. Put the class on every order line and label.
Galvanised bolts with plain nuts. Hot-dip galvanised bolts need matching oversize-tapped galvanised nuts.
Ordering by DIN numbers for an AS range. Head sizes and thread lengths can differ between standards. Quote the standard your customers use.
What to Send with Your Enquiry
| Item | What to tell us |
|---|---|
| Size | Diameter, length and thread type |
| Standard | AS/NZS, ISO, DIN or drawing |
| Material and class | Class 4.6, 8.8, 10.9, or 304 / 316 stainless |
| Finish | Zinc, galvanised, black or Dacromet |
| Quantity | Quantity for each size |
| Packing | Bulk carton, own-brand box, bucket or small pack |
| Destination | Destination port |
Packing and Supply for Distributors
We pack hex bolts in bulk cartons for trade distribution, or in your own branded boxes, buckets and small packs for retail. Each size can carry its own label. For customers who plan several deliveries through the year, we offer free warehouse storage and staged shipments.
Work With Linkworld
Linkworld has more than 20 years of fastener export experience and runs its own cold heading workshop. Our own QC team checks head, thread, length, hardness and coating in our inspection room before every shipment. We make bolts to standard or to drawing, so special lengths, threads and finishes are welcome.
Frequently Asked Questions
What sizes of hex bolts do you supply?
Metric hex bolts from M6 to M48. Larger sizes can be made to drawing.
What is the difference between a hex bolt and a hex set screw?
A hex bolt has a plain shank under the head. A hex set screw is threaded all the way to the head.
Do you supply galvanised hex bolts?
Yes. Hot-dip galvanised hex bolts are supplied with matching galvanised nuts on request.
What strength classes are available?
Class 4.6, 8.8 and 10.9 in carbon and alloy steel, and 304 or 316 stainless steel.
Can you make hex bolts to AS/NZS 1110?
Yes. We make hex bolts to AS/NZS, ISO or DIN dimensions, or to your drawing.
Looking for hex bolts in your own sizes or packs?
Send the sizes, class, finish, quantity and packing you need through the enquiry form below, and our team will reply with the options that fit your range.
Send an Enquiry
Send a drawing, sample or clear reference photo. Add the quantity and application if available, and we can start from the information you already have.