ISO 8674 dimensions — Hexagon high nuts (style 2), fine pitch
2023 edition, current · 14 sizes, M8 – M39 see the cross-reference →
✓We supply to ISO 8674. Name it on your order.
ISO 8674 dimensions
| Thread size | PThread Pitch (mm) | sWidth Across Flats (max) (mm) | eWidth Across Corners (min) (mm) | mNut Height (mm) | mNut Height (min) (mm) | Clearance holefine / medium / coarse (mm) | Tap drillcoarse pitch (mm) |
|---|---|---|---|---|---|---|---|
| M8 | 1 | 13 | 14.38 | 7.5 | 7.14 | 8.4 / 9 / 10 | 7 |
| M10 | 1.25 | 16 | 17.77 | 9.3 | 8.94 | 10.5 / 11 / 12 | 8.8 |
| M12 | 1.5 | 18 | 20.03 | 12 | 11.57 | 13 / 13.5 / 14.5 | 10.5 |
| M14 | 1.5 | 21 | 23.36 | 14.1 | 13.4 | 15 / 15.5 / 16.5 | 12.5 |
| M16 | 1.5 | 24 | 26.75 | 16.4 | 15.7 | 17 / 17.5 / 18.5 | 14.5 |
| M18 | 2 | 27 | 29.56 | 17.6 | 16.9 | 19 / 20 / 21 | 16 |
| M20 | 2 | 30 | 32.95 | 20.3 | 19 | 21 / 22 / 24 | 18 |
| M22 | 2 | 34 | 37.29 | 21.8 | 20.5 | 23 / 24 / 26 | 20 |
| M24 | 2 | 36 | 39.55 | 23.9 | 22.6 | 25 / 26 / 28 | 22 |
| M27 | 2 | 41 | 45.2 | 26.7 | 25.4 | 28 / 30 / 32 | 25 |
| M30 | 2 | 46 | 50.85 | 28.6 | 27.3 | 31 / 33 / 35 | 28 |
| M33 | 2 | 50 | 55.37 | 32.5 | 30.9 | 34 / 36 / 38 | 31 |
| M36 | 3 | 55 | 60.79 | 34.7 | 33.1 | 37 / 39 / 42 | 33 |
| M39 | 3 | 60 | 66.44 | 37.5 | 35.9 | 40 / 42 / 45 | 36 |
14 of 14 sizes shown. Clearance holes are fine / medium / coarse to ISO 273; tap drill is for the coarse pitch.
What we supply to ISO 8674
2 materials| Material | Property class | Finish |
|---|---|---|
| Carbon Steel | 6 · 8 · 10 | Plain · Zinc Plated · Hot Dip Galvanized · Dacromet · Blackened · Phosphate |
| Stainless Steel | A2-70 · A4-80 | Passivated · Plain |
Property classes
ISO 898-1 · ISO 3506-1| Class | Rm min. | Yield requirement | Elongation requirement | Hardness | Typical use |
|---|---|---|---|---|---|
| A2-70 | 700 MPa | Rp0.2 min. 450 MPa | 0,4d mm | - | Cold-worked austenitic stainless, typically 304 — outdoor, wet and food service away from chlorides. |
| A4-80 | 800 MPa | Rp0.2 min. 600 MPa | 0,3d mm | - | The strongest 316-type class; marine and chemical service where 70 does not carry the load. |
These values meet the requirements of ISO 3506-1. We supply to these classes and issue the matching mill certificate and third-party test report with your order.
