ISO fine thread

Old JIS coarse threadISO 4032 (JIS B 1181)Dimensions from the JIS before 1993. Some sizes differ from ISO across the flats, so use it when you have to match existing equipment or drawings. Heights for styles 1/2 and 3 are listed.Old JIS fine threadISO 4032 (JIS B 1181)The fine-pitch thread within the old JIS. The dimensions at each nominal diameter are the same as for the coarse series; only the pitch differs. M8 to M36 are listed.ISO coarse threadISO 4032 (JIS B 1181)The current dimensions aligned with ISO. Use these for new designs. Heights for style 1, style 2 and the thin nut are listed.ISO fine threadISO 4032 (JIS B 1181)The fine-pitch thread within ISO. The dimensions at each nominal diameter are the same as for the coarse series; only the pitch differs. M8 to M64 are listed.

Hexagon nut, ISO fine thread

Diagram: Hexagon nut ISO fine thread

Filter by nominal size

Nominal diameter	Pitch	Nut height	d_w	S	e
Nominal diameter	Pitch	Style 1	d_w	S	e

Notes

References

JIS B 1181

Fine thread data covers M8 to M64. Heights for style 2 and thin nuts are not shown, because the source has no fine thread data for them.

Nuts — Hexagon nut — ISO fine thread — Nut Dimensions | Updraft - Mechanical Engineering Calculators