Home
Contact Info
Gallery
Discussion Board
Online Catalog HR BarsCommercial Tolerances  
Structural
Plate
Sheet Metal
HR Bars
CF Bars
Alloy Bars
Tool Steel
Tubing
Steel Tubing & Pipe
Stainless Steel
Aluminum
Copper / Brass
Gratings & Expanded Metal
Glossary of Terms

Commercial Tolerances



  Size Tolerances (inches)  

Specified Sizes (inches)

Over

 Under

Out-of-Round or
Out-of-Square Section (inches)

1/2 thru 5/8

0.007

0.007

0.010

Over 5/8 thru 7/8

0.008

0.008

0.012

Over 7/8 thru 1

0.009

0.009

0.013

Over 1 thru 1-1/8

0.010

0.010

0.015

Over 1-1/8 thru 1-1/4

0.011

0.011

0.016

Over 1-1/4 thru 1-3/8

0.012

0.012

0.018

Over 1-3/8 thru 1-1/2

0.014

0.014

0.021

Over 1-1/2 thru 2

1/64

1/64

0.023

Over 2 thru 2-1/2

1/32

0

0.023

Over 2-1/2 thru 3-1/2

3/64

0

0.035

Over 3-1/2 thru 4-1/2

1/16

0

0.046

Over 4-1/2 thru 5-1/2

5/64

0

0.058

Over 5-1/2 thru 6-1/2

1/8

0

0.070

Over 6-1/2 thru 8-1/4

5/32

0

0.085

Over 8-1/4 thru 9-1/2

3/16

0

0.100

Over 9-1/2 thru 10

1/4

0

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.

Variations from thickness, for thicknesses given over and under (inches)

Variations from Width (inches)

Specified Widths (inches)

0.203 up to 0.230

0.230 up to 1/4

1/4 thru 1/2

Over 1/2 thru 1

Over 1 thru 2

Over 2 thru 3

Over 3

Over 3

Under

Up thru 1

.007

.007

.008

.010

     

1/64

1/64

Over 1 thru 2

.007

.007

.012

.015

1/32

   

1/32

1/32

Over 2 thru 4

.008

.008

.015

.020

1/32

3/64

3/64

1/16

1/32

Over 4 thru 6

.009

.009

.015

.020

1/32

3/64

3/64

3/32

1/16

Over 6 thru 8

*

.015

.018

.025

1/32

3/64

1/16

1/8

3/32**

•Where appears there is no requirement.

*Fiats over 6 thru 8 in width are notavailable as hot-rolled carbon steel bars in thickness under 0.230.

**For flats over 6 thru 8 in width and thru 3 in thickness.

Metal Mart U.S.A. (586) 977-5820
Site Design by
Orange Creative Solutions