DIMENSIONS AND TOLERANCES FOR COPPER & COPPER ALLOY RODS AND BARS FOR GENERAL ENGINEERING PURPOSES AS PER IS 2826 - 1996

For Round Rods & Bars

All Dimensions are in millimeters

Diameter Normal Tolerance Close Tolerance
Over Up to & Including
6 10 ± 0.05 – 0.05
10 20 ± 0.10 – 0.05
20 30 ± 0.15 – 0.08
30 50 ± 0.20 – 0.10
50 70 ± 0.75 percent ± 0.5 percent
70 100 ± 1.5 percent ± 1.75 percent
100   ± 2.5 percent ± 1.5 percent

For Square Rods & Bars

All Dimensions are in millimeters

Width Across Flats Normal Tolerance Close Tolerance
Over Up to & Including
6 10 ± 0.09 – 0.05
10 20 ± 0.13 – 0.10
20 30 ± 0.18 – 0.13
30 40 ± 0.18 – 0.15
40 50 ± 1.0 percent ± 0.75 percent
70 100 ± 2.0 percent ± 1.5 percent
100   ± 3.0 percent ± 2.0 percent

For Hexagonal Rods & Bars

All Dimensions are in millimeters

Width Across Flats Normal Tolerance Close Tolerance
Over Up to & Including
6 10 – 0.10 -0.08
10 20 – 0.20 – 0.10
20 30 – 0.25 – 0.13
30 40 – 0.30 – 0.15
40 50 – 0.40 – 0.20
50 70 – 0.50 – 0.25
70 100 – 2.0 percent – 1.5 percent
100   – 3.0 percent – 2.0 percent
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