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Tolerances – Size: Out of Round/Square

Size Tolerances and Out-of-Round or
Out-of-Square Tolerances
Size Tolerance, in. Size Tolerance, in.
Specified Sizes, In. Over Under Out-of-Round or
Out-of-Square, In.
To 5/16 incl. .005 .005 .008
Over 5/16 to 7/16 incl. .006 .006 .009
Over 7/16 to 5/8 incl. .007 .007 .010
Over 5/8 to 7/8 incl. .008 .008 .012
Over 7/8 to 1 incl. .009 .009 .013
Over 1 to 11/8 incl. .010 .010 .015
Over 11/8 to 1¼ incl. .011 .011 .016
Over 1¼ to 13/8 incl. .012 .012 .018
Over 13/8 to 1½ incl. .014 .014 .021
Over 1½ to 2 incl. 1/64 – 1/64 .023
Over 2 to 2½ incl. 1/32 – 0 .023
Over 2½ to 3½ incl. 3/64 – 0 .035
Over 3½ to 41/2 incl. 1/16 – 0 .046
Over 4½ to 51/2 incl. 5/64 – 0 .058
Over 5½ to 6½ incl. 1/8 – 0 .070
Over 6½ to 81/4 incl. 5/32 – 0 .085
Over 81/4 to 91/2 incl. 3/16 – 0 .100
Over 9½ to 10 incl. 1/4 – 0 .120

Out-of-round is the difference between the maximum and minimum diameters of the bar, measured at the same transverse cross section.

Out-of -square section is the difference in perpendicular distance between opposite faces, measured at the same transverse cross section.

Tolerances shown are based upon ASTM A29.Reference:AISI Steel Products Manual, Alloy, Carbon and HSLA Steels. March, 1986.