Bolt: hexagon head · ISO 4017
ISO 4017 hexagon head screw M20x55
ISO 4017 - Hexagon head screws
ISO 4017 M20x55
| Thread diameter | 20 mm |
|---|---|
| Thread pitch | 2.5 mm |
| Bolt length | 55 mm |
| Thread length | 47.5 mm |
| Width across flats | 30 mm |
| Width across corners | 33.53 mm |
| Head height | 12.5 mm |
| Head bearing face diameter | 28.19 mm |
| Radius under head | 0.8 mm |
| Transition diameter | 22.4 mm |
| Unthreaded shank diameter | 18.376 mm |
| Product grade | A |