Most engineering college libraries purchase digital licenses. Check if your college has a or NPTEL access portal. Many institutions have started providing legal PDFs of standard data books to students via their internal LMS.
Machine Design Data Handbook S. Md. Jalaludeen (Anuradha Publications) is a cornerstone reference for mechanical, automobile, and industrial engineering students. It is specifically structured to assist in solving complex design problems by providing standardized equations, tables, and graphs in SI and Metric units Reference Paper Draft machine design data book by jalaluddin pdf
: Riveted joints, welded joints, threaded fasteners, and power screws. Most engineering college libraries purchase digital licenses