M4 x 20 mm cylinder head screw / machine screw with hex socket made of galvanized steel for general-purpose use, including on your moped, scooter, and small motorcycle.
Price per piece.
| Width across flats | 3 mm |
| Drive | Hexagon socket |
| Material | Steel |
| Surface | galvanized (blue) |
| Number of components | 1 pcs |
| Total length | 23.8 mm |
| Nominal diameter (thread) | 4 mm |
| Thread length | 20 mm |
| Thread type | M4x0.7 (standard thread) |
| Screw head | Cylinder head |
| Ø External head | 6.9 mm |
| Shank | No |
| Strength class | 8.8 |
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