EN 12150 and ASTM C1048 are two widely used standards for tempered glass in Europe and the United States, respectively. While both standards cover similar requirements and testing methods, there are some differences in their specifications for tolerances on hole diameters in tempered glass.
In general, both standards specify that tempered glass must meet certain dimensional tolerances for thickness, length, width, and hole diameter. They also specify that the position of any holes or cutouts in the glass must meet certain tolerances to ensure that they do not weaken the structural integrity of the glass.
However, there are some differences between EN 12150 and ASTM C1048 when it comes to the tolerances on hole diameters in tempered glass: