Nash Equilibrium is a term used in game theory to describe an equilibrium where each player's strategy is optimal given the strategies of all other players.
Retaining rings are circular fasteners that fit over shafts or inside cylindrical products such as pipe. There are two main types: internal and external. Internal retaining rings have a diameter specified for the bore and groove sizes they will fit into. External retaining rings, also known as retaining rings for shafts, have a diameter specified for the shaft and groove sizes it fits around. Both industrial retaining ring types, also known as a retaining clip, have a thickness dimension. Measurements will be expressed in inch or millimeters. Retaining ring material varies based on application. Stainless steel retaining rings are made from one of the most common ring materials.
Snap rings locate and retain components in a wide range of applications, from rotating equipment to valve bodies. There are two basic types of rings, internal and external. An internal ring, for example, keeps a spool valve in a bore, while an external ring may locate a splined gear on a mating shaft. Rings typically incorporate a pair of ears to which an appropriate pair of snap-ring pliers engages. The pliers expand or contract the ring to unseat it from its locating groove.