Engineering Tools
Reference data for specifying and sourcing fasteners correctly — the numbers a procurement or design engineer actually needs.
DIN 1587 — Dome cap / acorn nut
Also referenced as: ISO 4032 (domed variant)
Approximated dimensionsHex nut body closed off with a hemispherical dome, hiding the bolt end for appearance/safety. Real manufacturer dimensions vary more than open nuts.
| Size | Across flats (S) |
|---|---|
| M6 | 10 mm |
| M8 | 13 mm |
| M10 | 17 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 | 4.98 g |
| M8 | 10.69 g |
| M10 | 23.08 g |
| M12 | 33.34 g |
| M16 | 65.76 g |
| M20 | 126.46 g |
| M24 | 216.18 g |
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