Property class reference
Mechanical
properties.
| Class | Nominal tensile N/mm² | Minimum tensile N/mm² | Vickers HV min | Proof stress N/mm² |
|---|---|---|---|---|
| 3.6 | 300 | 330 | 95 | 180 |
| 4.6 | 400 | 400 | 120 | 225 |
| 4.8 | 400 | 420 | 130 | 310 |
| 5.6 | 500 | 500 | 155 | 280 |
| 5.8 | 500 | 520 | 160 | 380 |
| 6.8 | 600 | 600 | 190 | 440 |
| 8.8 | 800 | 800 / 830 | 250 / 255 | 580 / 600 |
| 9.8 | 900 | 900 | 290 | 650 |
| 10.9 | 1000 | 1040 | 320 | 830 |
| 12.9 | 1200 | 1220 | 385 | 970 |
Reading the class
Property class forms part of a complete fastener specification. Diameter, thread, material route, heat treatment, marking and inspection all affect suitability.
Reference extract from the supplied catalogue. Verify the applicable standard and approved specification.
Next step
Send the requirement.
Get a clear quotation.
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