What would represent a coarse thread on a bolt?

A coarse thread on a bolt is defined by threads that are widely spaced apart. This spacing allows for quicker installation and provides a strong grip, making coarse threads particularly suitable for applications where quick assembly or disassembly is necessary. The larger thread profile also helps prevent cross-threading and is less likely to strip in softer materials.

In contrast, threads that are closely spaced indicate fine threads, which are designed for precision and better holding power in tighter spaces but may require more turns for the same amount of engagement. Options that mention no threads or those that are threaded with fine pitch do not align with the characteristics of coarse threads. Providing clarity on these options emphasizes the distinctiveness of coarse threads, reinforcing why widely spaced threads are considered coarse.