Bright Mild Steel Tolerances

Bright Drawn Rounds - Metric          

Size (diameter)

Tolerance in mm

Under 6mm

- 0.070mm / + 0.000mm

6mm up to and including 18mm

- 0.070mm / + 0.000mm

Over 18mm up to and including 30mm

- 0.085mm / + 0.000mm

Over 30mm up to and including 50mm

- 0.100mm / + 0.000mm

Over 50mm up to and including 80mm

- 0.120mm / + 0.000mm

Over 81mm up to and including 120mm

- 0.140mm / + 0.000mm

Bright Turned Bar - Metric

Size (diameter)

Tolerance in mm

Up to and including 120mm

As table above

Over 120mm up to and including 180mm

- 0.160mm / + 0.000mm

Over 180mm up to and including 250mm

- 0.185mm / + 0.000mm

Over 250mm up to and including 315mm

- 0.210mm / + 0.000mm

Over 315mm up to and including 400mm

- 0.230mm / + 0.000mm

 Over 400mm

- 0.250mm / + 0.000mm

Bright Metric Squares and Hexagons - Metric

A/F (Across Flat) Range

 Tolerance in mm

* Under 6mm

- 0.070mm / + 0.000mm

6mm up to and including 18mm

- 0.090mm / + 0.000mm

18mm up to and including 30mm

 - 0.110mm / + 0.000mm

30mm up to and including 50mm

 - 0.130mm / + 0.000mm

 50mm up to and including 80mm

 - 0.160mm / + 0.000mm

80mm up to and including 105mm

 - 0.250mm / + 0.000mm

* This range is not covered by British Standards

Bright Flat Bars - Metric

                                                                                           

Width Range

Tolerance in mm

 Up to and including 18mm

- 0.110mm / + 0.000mm

Over 18mm up to and including 30mm

- 0.130mm / + 0.000mm

Over 30mm up to and including 50mm

- 0.160mm / + 0.000mm

Over 50mm up to and including 80mm

- 0.190mm / + 0.000mm

Over 80mm up to and including 100mm

- 0.220mm / + 0.000mm

Over 100mm up to and including 130mm

- 0.350mm / + 0.000mm

Over 130mm up to and including 160mm

- 1.000mm / + 0.000mm

Over 160mm up to and including 320mm

- 1.000mm / + 1.000mm

 

Thickness Range

Tolerance in mm

Up to and including 18mm

- 0.110mm / + 0.000mm

Over 18mm up to and including 30mm

- 0.130mm / + 0.000mm

Over 30mm up to and including 50mm

- 0.250mm / + 0.000mm

Over 50mm up to and including 80mm

- 0.350mm / + 0.000mm

Bright Flat Bars - Imperial

Tolerances as per metric equivalent.

Bright Drawn Rounds - Imperial

Size (diameter)

Tolerance in inches

1/2” up to and including  7/8”

- 0.003” / + 0.000”

Over 7/8” up to and including 2”

- 0.004” / + 0.000”

Over 2” up to and including 4”

- 0.005” / + 0.000”

Over 4” up to and including 5”

- 0.006” / + 0.000”

Over 5”

- 0.007” / + 0.000”

Bright Turned Bar  -  Imperial         

Tolerances as per metric equivalent.

Bright Squares - Imperial        

 

A/F (Across Flat) Range

Tolerance in Inches

1/2” up to and including 7/8”

- 0.004” / + 0.000”

Over 7/8” up to and including 2”

- 0.005” / + 0.000”

Over 2” up to and including 3”

- 0.006” / + 0.000”

Bright Hexagons - Imperial  

A/F (Across Flat) Range

Tolerance in inches

0.525” up to and including 0.920”

- 0.004” / + 0.000”

Over 0.920” up to and including 2.050”

- 0.005” / + 0.000”

Over 2.050” up to and including 3.340”

- 0.006” / + 0.000”

Over 3.560”

- 0.010” / + 0.000”