If you own the 3rd edition from the early 2000s, it is time to upgrade. The world of metrology (measurement) has moved to lasers and CMMs, and the 4th edition reflects that shift in precision.
You can find the Mechanical and Metal Trades Handbook, 4th Edition through standard technical book distributors (like Industrial Press in the US or Verlag Europa-Lehrmittel in Germany), major online retailers, or your union hall’s bookstore. mechanical and metal trades handbook 4th edition
Keep it in your toolbox. You will reach for it weekly. If you own the 3rd edition from the