Fasteners are important elements used in construction industry to join two or more objects together in a non-permanent way. Each construction project will need different type of fasteners in order for them to ensure a strong, secure, and safe final construction. Here are some examples:
Toggles, usually toggle bolts, are a kind of wall fastener for use on hollow walls, having a part that springs open or turns through 90° after it is inserted so as to prevent withdrawal. They are used for hanging objects on hollow walls such as drywall. It has wings that open inside a hollow wall, bracing against it to hold the fastener securely.
A stud is a relatively long rod that is threaded on both ends; the thread may extend along the complete length of the rod. It usually has no head, and simply acts as a threaded rod onto which nuts can be attached.
Rivets are permanent mechanical fasteners for making a joint between two or more metal sheets. On installation, the rivet is placed in a drilled hole and the tail is bucked, so that it expands to about 1.5 times the original shaft diameter, holding the rivet in place.
Another type of a fastener are washers. They are used to distribute the weight of a threaded fastener, washers are thin plates with a hole that can also be used as spacers, springs, wear pads, and locking devices.