Introduction to Fastener Threads 221

Introduction to Fastener Threads provides a comprehensive overview of threads and thread standards used with fasteners. Fasteners use threads to hold components together or grip material. Threads may be external, like those on screws and bolts, or internal, like those in nuts. All threads have crests, roots, and flanks, but these may vary in shape and size. The two main thread standards are Unified and ISO metric. Unified threads are measured in inches and metric threads are measured in millimeters. Threaded fasteners are the most popular type of fasteners in assembly. After taking this class, users will be able to identify the parts of a thread, distinguish between different types of threads, and understand thread specifications. This knowledge will prepare users to work with threaded fasteners and select appropriate fasteners for different applications.