For historical tolerance data (USASI B4.1-1967), the Internet Archive offers scanned repacks of entire out-of-print standards books.
This report outlines the nature of Tolerance Data, explains the “repack” phenomenon, identifies major risks (malware, legal liability, lack of support), and recommends legitimate alternatives. tolerance data free download repack
Avoid repacks. Use R, Python, or an official trial instead. For historical tolerance data (USASI B4