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Reference data for specifying and sourcing fasteners correctly — the numbers a procurement or design engineer actually needs.
DIN 603 — Carriage bolt
Also referenced as: ISO 8677
Approximated dimensionsDomed head with a square neck under it that bites into the mating material, stopping the bolt from spinning while the nut is tightened — no wrench needed on the head side.
Illustrative — not to scale
| Size | Head diameter (approx.) | Square neck (approx.) |
|---|---|---|
| M6 | 13 mm | 6 mm |
| M8 | 17 mm | 8 mm |
| M10 | 21 mm | 10 mm |
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