Screw Threads and Threading Operations covers the principles, terminology, and methods used to produce threaded features—an essential part of most mechanical assemblies. Threads allow parts to be fastened, adjusted, or disassembled and are found in everything from bolts and nuts to precision lead screws. This section introduces the different types of threads, how they are specified, and how they can be created using tools like taps, dies, and threading operations on lathes. Understanding threads is critical not just for making fasteners, but for designing and producing components that assemble reliably and function correctly.