STANDARD Drafting Practices GEOMETRIC SYMBOLS Machinery's Handbook, 31st Edition
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Table 4. ASME Geometric Symbols ASME Y14.5-2018 Table 4.ASME Geometric Symbols ASME Y14.5-2018
Symbol for Straightness
Symbol for
Diameter
Basic Dimension
Flatness
50
Circularity
Reference Dimension
(50)
Datum Feature (triangle may be filled in or not)
Cylindricity
A
Angularity
Dimension Origin
Perpendicularity
Feature Control Frame
C 0.5 M A B
Conical Taper
Parallelism
Position
Slope
Profile of a Line Profile of a Surface Circular Runout (arrowhead may be filled in or not) Total Runout (arrowheads may be filled in or not) AllAround
Counterbore
SF
Spotface
Countersink
Depth/Deep
Square
15
All Over
Dimension Not to Scale
At Maximum Material Condition
Number of Places
8X
M
At Maximum Material Boundary
Arc Length
M
105
At Least Material Condition
Radius
L
R
Spherical Radius
At Least Material Boundary
L
SR
ProjectedTolerance Zone
Spherical Diameter
S
P
Tangent Plane
Controlled Radius
CR
T
Between (arrowheads may be filled in or not)
Free State
F
Unequally Disposed Profile
Statistical Tolerance
ST
U
Envelope Principle
Default
Continuous Feature
CF
6
6
Independency
Datum Target
I
or
A1
A1
Dynamic ProfileTolerance
Movable DatumTarget
A1
Translation
Target Point
From /To
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