Technical

Dimensional Tolerances

The linear dimensions of individual regular units should conform to the tolerances given in this table, although individual UKCSA members may specify tolerances that are tighter.

Dimension (mm)
Tolerance (mm)
Up to 600 + / - 2
601 – 10001 + / - 3
1001-2500 + / - 4
2501-4000 + / - 5
Over 4000 + / - 6

Flatness of plane surface
Max permitted variation = 0.3%

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