Free Engineering Tool
Socket Head Cap Screw — ISO 4762
Look up dimensions of metric socket head cap screws (Allen bolts) per ISO 4762 / DIN 912. Select size to see head dia, height, hex key, and mass.
This calculator was developed and verified by the Vibromera engineering team, makers of the Balanset portable balancing instruments.
Results
ISO 4762 Dimensions
| Size | dk (mm) | k (mm) | Hex Key |
|---|---|---|---|
| M3 | 5.5 | 3.0 | 2.5 |
| M4 | 7.0 | 4.0 | 3 |
| M5 | 8.5 | 5.0 | 4 |
| M6 | 10.0 | 6.0 | 5 |
| M8 | 13.0 | 8.0 | 6 |
| M10 | 16.0 | 10.0 | 8 |
| M12 | 18.0 | 12.0 | 10 |
| M16 | 24.0 | 16.0 | 14 |
| M20 | 30.0 | 20.0 | 17 |
| M24 | 36.0 | 24.0 | 19 |
Counterbore diameter is typically dk + 1 mm for clearance.
Professional instruments. Used in 50+ countries.
Nikolai Shelkovenko
Nikolai Shelkovenko is a vibration analysis engineer and the founder and CEO of Vibromera. For more than 15 years he has balanced rotating equipment in the field rather than on a test bench: mulchers, industrial fans, crushers, centrifuges, shafts and spindles. That work is what the Balanset instruments grew out of — they were designed as a tool a specialist can carry to the machine and use alone, on site, not as laboratory equipment. Vibromera was founded in 2017 and has been based in Porto, Portugal, since 2023. Development, assembly and support of the Balanset line all happen here. The flagship instrument is the Balanset-1A, a portable analyser for single- and two-plane balancing and for vibration diagnostics. Nikolai is personally involved in customer support, in working through difficult balancing cases and in the development of the software. He works with customers worldwide, in any language.
