Symbol 5147 from IEC 60417 - Title/Meaning: Adjustment to a maximum Function/description: To identify the control by means of which a quantity is adjusted to its maximum value.
Additional information: 
For example: tuning, maximum deviation of a meter, indicator, etc
Published in: First edition, 1973
Own work using: iso.org/obp/graphics/grs/6d70a4e9-0232-40fe-a1e0-a850e1232232 200.png
Vectorization:  Mrmw