Design - Hole Tolerances

Minimum tolerances for holes are:- Up to 6mm (0.25")+/- 0.75 (+/- 0.003"). Up to 12.7mm (0.50)+/- 0.10 (+/- 0.004"). Over 12.7mm (0.50")+/- 0.13 per 25mm (+/- 0.005" per inch).