hex-key-dat
Internal hexagon
the specifications of Allen keys / hex keys are defined by the across-flats (AF) size, meaning the distance between two opposite flat sides of the hexagon.
So you can say:
- “Hex key sizes are specified by the across-flats dimension.”
Example: a 6 mm Allen key means the hexagon measures 6 mm across the flats.
1.5mm
- 2mm
- 2.5mm
- 3mm
- 4mm
- 5mm
- 6mm
- 8mm
- 10mm
- 12mm
- 14mm
- 16mm
- 17mm
- 18mm
- 19mm
- 20mm