A perforated block (usually a small piece of metal), provided with an internal or female screw thread, used on a bolt, or screw, for tightening or holding something, or for transmitting motion. See Illust. of 1st Bolt.
A fastener having internal threads used on a bolt to secure two or more pieces together.
1] A fastening device that is roughly doughnut shaped with a number of flat surfaces on the outer rim and threads on the inner hole. Also see bolt and nut, butterfly nut, castellated nut, lug nut, and wing nut.  A person who is greatly interested in a field such as "Jim is a car nut." Also see buff.
Metal wedge used for protection in cracks.
a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt
A small metal wedge which is threaded with a steel wire. These are placed into crags and are the simplest form of protection
A small piece of iron with a threaded core to fit on the screw end of a bolt, rod, or bar. (Plate II., Fig. 6.)
The tensioning component of a compression fitting. As the threaded nut is tightened into the fitting detail, it pushes the ferrule forward into the tapered ferrule seat, causing it to make up on the tube.
Passive protection piece consisting of a wedge-shaped piece of metal affixed to a wire.
A short prism of metal having a central hole which is threaded to receive a bolt or a screw.
A small metal piece with a hole in the center that fits over a bolt or over the end of a bolt. Nuts are often hexagonal (6-sided) in shape.
A small square or hexagonal flat piece of metal or other material with a threaded hole through it for screwing on the end of a bolt to secure it.
A metal wedge with a wire loop that is inserted in cracks for protection.
The simplest form of protection. A metal wedge threaded on steel wires, intended to go into cracks and stay there. The name comes from the practice of 1950s climbers, who used motorcycle nuts.
(n) An internally threaded device used on the ends of threaded fasteners to join materials. Nuts are an alternative to threading the part itself and are often paired with a washer to assist in distributing the pressure and/or securing the nut.
A fastener with a threaded hole that receives a bolt.
A nut is a type of hardware fastener with a threaded hole. Nuts are almost always used opposite a mating bolt to fasten a stack of parts together. The two partners are kept together by a combination of their threads' friction, a slight stretch of the bolt, and compression of the parts.
In rock climbing, a nut (or chock or chockstone) is a metal wedge threaded on a wire, used for protection by wedging it into a crack in the rock. Nuts come in a variety of sizes and styles, and several different brands are made by competing manufacturers. Most nuts are made out of aluminum.