Engineering Tools
Reference data for specifying and sourcing fasteners correctly — the numbers a procurement or design engineer actually needs.
DIN 557 — Square nut
Also referenced as: ISO 4034
Approximated dimensionsSquare cross-section nut. Dimensions below approximate the across-flats/height of the equivalent hex nut size, since a distinct published table wasn’t used.
| Size | Across flats (S, approx.) | Height (approx.) |
|---|---|---|
| M6 | 10 mm | 5 mm |
| M8 | 13 mm | 6.5 mm |
| M10 | 17 mm | 8 mm |
Weight per piece (mild steel)
Computed the same way as the Weight Calculator — for other materials, use that tool directly.
| Size | Weight (g) |
|---|---|
| M6 | 3.14 g |
| M8 | 6.75 g |
| M10 | 14.51 g |
| M12 | 21.72 g |
| M16 | 42.76 g |
| M20 | 82.27 g |
| M24 | 140.65 g |
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