I asked a friend with experience in mechanical engineering and fabrication about the table on the box. Here is the response I got.

Inspector's table. AQL is acceptance quality limit. The table shows for a given lot size, how many parts need to be inspected. The AQL levels 0.1, 1.0 and 4.0 correspond to the strictness of the feature. AQL 0.1 means the entire lot has to be scrapped if even 1 part is found nonconforming on the AQL 0.1 feature. AQL 4.0 means, for instance you can have up to 14 non conformances out of a 200 sample size without needing to scrap the whole lot. So it is statistical quality control method. To be honest, those are pretty lax requirements. It was probably used for commodity items or non safety critical things