What is the weight tolerance for a Franklin Half Dollar What deviation plus or - is allowed by the US Mint from its?

The weight standard in grams is set at 12.50gm. There is no high or low limit for weight deviation, but a total tolerance of 0.259gm. In grains, the weight is set at 192.904 with a total 4.00 grain tolerance. The specifications apply only to Half dollars from 1947 to 1964.