Cross Sectional

 Cross Sectional Tolerances for Metal Dimensions of Solid Shapes and Class B,C and D Hollow Shapes
Cross Sectional

Specified dimension

 

ALLOWABLE DEVIATION FROM SPECIFIED DIMENSION, PLUS OR MINUS  

All metal dimensions except those covered  by Column 3 and Column 4  

All wall thicknesses completely enclosing space 70mm2 and over, except those covered by Column 4  

Wall thickness between adjacent voids enclosing space 70mm2 and over  

Column 1  

Column 2  

Column 3  

Column 4  

 

Circumscribing circle diameter (CCD)  

Circumscribing circle diameter (CCD)  

Circumscribing circle diameter (CCD)  

250  

>250  

250  

>250  

250  

>250  

>1.0

>1.5

>3.0

1.5

3.0

4.0

0.15

0.15

0.20

0.35

0.35

0.40

-

0.40

0.50

0.35

0.35

0.40

-0.30

0.30

0.50

-

0.50

0.70

>4.0

>5.0

>6.0

5.0

6.0

7.0

0.20

0.20

0.20

0.40

0.40

0.40

0.50

0.60

0.70

0.70

0.80

1.00

0.60

0.70

0.80

0.80

1.00

1.20

>7.0

>8.0

>9.0

8.0

9.0

10

0.20

0.20

0.20

0.40

0.40

0.40

0.80

0.90

1.00

1.20

1.30

1.50

1.00

1.10

1.20

1.00

1.10

1.20

>10

>11

>12

8.0

9.0

16

0.20

0.20

0.25

0.40

0.40

0.45

1.10

1.20

1.30

1.60

1.70

1.80

1.30

1.50

1.60

1.90

2.10

2.30

>13

>14

>15

14

15

16

0.25

0.25

0.25

0.45

0.45

0.45

1.40

1.50

1.60

2.00

2.20

2.00

1.70

1.80

2.00

2.50

2.60

2.80

>16

>20

>25

20

25

40

0.25

0.25

0.30

0.45

0.45

0.50

1.60

1.60

1.60

2.30

2.30

2.30

2.00

2.00

2.00

2.80

2.80

2.80

>40

>50

>100

50

100

150

0.40

0.60

0.90

0.60

0.90

1.10

BY NEGOTIATION ONLY  

>150

>200

>250

200

250

300

1.10

1.40

*

1.40

1.70

1.90

>300

>350

350

400

*

*

2.20

2.40

all dimesions in millimetres unless specified - tighter tolerances available on request 

* Tolerances subject to negotiation

 

Cross Sectional Tolerances for Space Dimensions of Solid Shapes, and Class B, C and D Hollow Shapes

Refer to McKechnie Aluminium for Applications