Symbol 6320 from IEC 60417 - Title/Meaning: Distance, general; dimension, general Function/description: To indicate a required distance between two objects or to identify the control for measurement of dimension.[]The two vertial bars may be omitted depending on the applications where no ambiguity of span occurs.[]The gap between two arrow heads may be changed depending on the requirement of specific applications.[]A numerical value for the dimension of the gap may be added.
Additional information: 
See also ISO 7000-0439 and ISO 80416-2
IEC 60417-C00423;3C/1981/DC, Announcement of Validation;3C/2014/INF. Report of the result of voting
Own work using: iso.org/obp/graphics/grs/cc3c4b72-568c-4ea3-a0c1-9f656f71855c 200.png
Vectorization:  Mrmw