Rivets come in all shapes and sizes. Some have longer bodies, some have shorter ones. Some are solid for strength and vibration absorption, some are split for penetrating soft materials. The sheer diversity of heads alone can make your head spin. All these different versions of the same basic design only exist because every single variation is optimized for a particular purpose.
That principle applies to every other quality of the rivet, including the main material from which it is made. This brings us to the nylon rivet, which may sound silly but is more than meets the eye. Here is some information on this highly popular type of rivet, its distinct properties, and its many uses in many different fields.