|
 |
| Outside Dimension Tolerances |
| Largest Specified Outside Dimension Across Flats, in. |
Wall Thickness, in. |
±, in. across Flats, Convexity or Concavity incl |
| To 1 1/4 Incl |
all |
0.015 |
| Over 1 1/4 to 2 1/2, Incl |
all |
0.020 |
| Over 2 1/2 to 5 1/2, Incl |
all |
0.030 |
| Over 5 1/2 to 8, Incl |
all |
0.060 |
|
| Maximum Radii of Corners |
| Wall Thickness, in. |
Radii of Cornersmax, in. |
| Over 0.020 to 0.049, Incl |
3/32 |
| Over 0.049 to 0.065, Incl |
1/8 |
| Over 0.065 to 0.083, Incl |
9/64 |
| Over 0.083 to 0.095, Incl |
3/16 |
| Over 0.095 to 0.109, Incl |
13/64 |
| Over 0.109 to 0.134, Incl |
7/32 |
| Over 0.134 to 0.156, Incl |
1/4 |
| Over 0.156 to 0.200, Incl |
3/8 |
| Over 0.200 to 0.250, Incl |
1/2 |
| Over 0.250 to 0.375, Incl |
3/4 |
|
| Twist Tolerances |
| Largest Size, in. |
Twist in 3 ft, max, in. |
| Under 1/2 |
0.050 |
| 1/2 to 1 1/2, Incl |
0.075 |
| Over 1 1/2 to 2 1/2, Incl |
0.095 |
| Over 2 1/2 to 4, Incl |
0.125 |
| Over 4 to 6, Incl |
0.025 |
| Over 6 |
0.375 |
|
Squareness of Sides
± B = C x 0.006 |
| Where: |
B = tolerance for out-of-square, and
C = length of longest side |
|
| The straightness tolerance is 0.075 in. in 3 ft using a 3-ft straightedge and feeler gage. |
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