Wrench size
Technical drawing with key width
As key length is the distance between two parallel surfaces, mostly for torque transmission by positive locking serve.
The term key length is used for the following forms:
- 2-socket = round material with two surfaces
- 4-socket = profile square section
- 6-socket, 8-square = regular polygons
Spanner
The key length indicates the "size" of the tool. It is imprinted on the wrenches in mm values. English and American wrenches have inch sizes that are imprinted in intermediate sizes in fractions.
Key width
The key length of the workpiece (for example screws, nuts, clamps) is nominally the same as that on the tool.
| d: | 1,6 | 2 | 2,5 | 3 | 3,5 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | |||||
| s: | 3,2 | 4 | 5 | 5,5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 17 | 18 | 21 | 24 | 27 | 30 | 34 | 36 | 41 | 46 | 50 | 55 | 60 | 65 |
 |
DIN ISO 272 |
|---|---|
| Area | fasteners |
| Titel | {{{rule}}} |
| Summary: | {{{Overview}}} |
| Last output | 1979-10 |
| ISO | 272 |
Widths on bicycle
In addition to industry standards exist or special thread factory standards, such as the bicycle thread according to DIN 79012, a fastening thread on metric-inch size basis of the designation. Modern bicycle spokes carry the bike thread FG 2.3.[1]
References
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