Wrench Size
Wrench Size (SW:Schlüsselweite, Wrench Width, Width across flats)
| Enter shaft diameter [5-75]mm: | ∅ |
| Hexagon that can fit this diameter: | |
| Standard SW dimension: | |
| Recommended minimum SW length: | |
| Possible wrenches that can be used: (t:thickness) | |
| Thread Size (Nominal Diameter) |
SW Width (Width Across Flats) |
Head Height (k) |
|---|---|---|
| M5 | 8 mm | 3.5 mm |
| M6 | 10 mm | 4 mm |
| M8 | 13 mm | 5.3 mm |
| M10 | 17 mm | 6.4 mm |
| M12 | 19 mm | 7.5 mm |
| M14 | 22 mm | 8.8 mm |
| M16 | 24 mm | 10 mm |
| M18 | 27 mm | 11.5 mm |
| M20 | 30 mm | 12.5 mm |
| M22 | 32 mm | 14 mm |
| M24 | 36 mm | 15 mm |
| M27 | 41 mm | 17 mm |
| M30 | 46 mm | 18.7 mm |
| M33 | 50 mm | 21 mm |
| M36 | 55 mm | 22.5 mm |
Sample Shafts:
Shaft and Hexagon Diagram:
ISO 10102:2018 Assembly tools for screws and nuts - Double-headed open-ended engineers' wrenches.
ISO 3318:2016 Assembly tools for screws and nuts - Open-ended wrenches, box wrenches and combination wrenches - Maximum widths of heads.
ISO 1085:2016 Assembly tools for screws and nuts - Double-ended wrenches - Size pairing.
ISO 691:2005 Assembly Tools for Screws and Nuts - Wrench and Socket Openings - Tolerances for General Use
DIN 3110:1987 Engineers wrenches, double head, open end, with unequal jaw widths; test torques series c.
DIN 475-2:1982 Wrench and socket openings.