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العربية Many buyers ask for “ISO 4017 hex bolts,” but in the standard language, ISO 4017 refers to hexagon head screws with full thread. In daily trade, people still call them full-thread hex bolts. That is acceptable in conversation, but your purchase order should be precise.
For global sourcing, this small wording issue matters. A supplier may quote DIN 933, ISO 4017, or “full thread hex bolt” as if they are always interchangeable. They are close, but serious buyers should still confirm the exact standard, grade, coating, and inspection requirements.
What ISO 4017 Covers
ISO 4017 defines metric hex head fasteners with full thread. These bolts are common in machinery, brackets, equipment frames, maintenance work, and general industrial assembly.
For product references, buyers can review the bolt category and compare available materials and finishes.
Key Specification Points
| Requirement | What Buyers Should Confirm |
|---|---|
| Product type | Hexagon head screw, full thread |
| Estándar | ISO 4017, or DIN 933 if accepted |
| Thread system | Metric coarse or specified fine thread |
| Strength class | 4.8, 8.8, 10.9, 12.9, A2-70, A4-70 |
| Material | Carbon steel, alloy steel, stainless steel |
| Finish | Plain, zinc plated, black oxide, HDG, zinc flake |
| Matching parts | ISO 4032 nuts, proper washers, project-approved sets |
ISO 4017 vs ISO 4014
Full Thread or Partial Thread
This is where many purchasing errors happen.
| Estándar | Thread Style | Typical Use |
|---|---|---|
| ISO 4017 | Full thread | General clamping, adjustable assemblies |
| ISO 4014 | Partial thread | Shear-sensitive joints, thicker grip lengths |
If the joint carries shear across the shank, ISO 4014 may be a better fit. If the assembly needs thread adjustment through the full length, ISO 4017 is usually more practical.
For a wider standards overview, see this guide to DIN and ISO fastener standards.
Strength, Coating, and Inspection
Do Not Specify the Standard Alone
ISO 4017 only tells part of the story. It does not replace the need to define strength, material, and surface treatment.
A complete order line should look like:
- ISO 4017 hex head screw
- M12 x 50 mm
- Class 8.8 carbon steel
- Zinc plated
- Full thread
- Matching ISO nut and washer if required
- MTC or inspection report if needed
For load-critical applications, review high-strength fasteners before choosing 8.8, 10.9, or 12.9. For outdoor or corrosive use, compare coated fastener options.
Practical Buying Advice
ISO 4017 is a reliable global standard, but it must be used with clear purchasing language. Do not write only “M12 ISO bolt.” Confirm full thread, grade, material, finish, nut compatibility, and packaging.
Good specifications prevent the most common problems: wrong thread length, mismatched nuts, coating disputes, and failed incoming inspection.