A plate nut, also known as a nut plate, anchor nut or anchor plate, is a
stamped sheet metal
Sheet metal is metal formed into thin, flat pieces, usually by an industrial process.
Thicknesses can vary significantly; extremely thin sheets are considered foil (metal), foil or Metal leaf, leaf, and pieces thicker than 6 mm (0.25 ...
nut
Nut often refers to:
* Nut (fruit), fruit composed of a hard shell and a seed
* Nut (food), a dry and edible fruit or seed, including but not limited to true nuts
* Nut (hardware), fastener used with a bolt
Nut, NUT or Nuts may also refer to:
A ...
that is usually
rivet
A rivet is a permanent mechanical fastener. Before being installed, a rivet consists of a smooth cylinder (geometry), cylindrical shaft with a head on one end. The end opposite the head is called the ''tail''. On installation, the deformed e ...
ed to a workpiece. They have a long tube that is internally threaded and a plate with two clearance holes for rivets. The most popular versions have two lugs and they exist as fixed anchor nuts and as floating anchor nuts.
The latter allows the nut to move slightly and so enlarges the positioning tolerances of the mounted parts. They were originally developed for the
aerospace industry
Aerospace is a term used to collectively refer to the atmosphere and outer space. Aerospace activity is very diverse, with a multitude of commercial, industrial, and military applications. Aerospace engineering consists of aeronautics and astr ...
but are now also common in
automotive racing
Auto racing (also known as car racing, motor racing, or automobile racing) is a motorsport involving the racing of automobiles for competition. In North America, the term is commonly used to describe all forms of automobile sport including non ...
.
[Smith, pp. 108–109.]
Locknut
A locknut, also known as a lock nut, locking nut, self-locking nut, prevailing torque nut,. stiff nut or elastic stop nut, is a Nut (hardware), nut that resists loosening under vibrations and torque. Prevailing torque nuts have some portion of ...
types are available, which utilize deformed threads or a nylon locking element, much like a
nyloc nut
A nyloc nut, also referred to as a nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut, is a kind of locknut with a nylon collar that increases friction on the screw thread.
The nylon collar insert is placed at the end of the nut, ...
. These locking plate nuts are used when the nut is subjected to constant changes in environment or to vibration. The nylon insert expands and stops vibrations of the nut and acts as a locking arrangement. Other types have a floating nut or replaceable locking elements.
A typical U.S. military specification for plate nuts is MS21047.
See also
*
Rivet nut
A rivet nut, also known as a blind rivet nut, or rivnut, is a one-piece internally screw thread, threaded and counterbored tubular rivet that can be anchored entirely from one side. It is a kind of threaded insert. There are two types: one is de ...
*
Speed nut
A speed nut, aka sheet metal nut or Tinnerman nut, is a type of locknut with two sheet metal prongs that act as one screw thread, thread. They are made from spring steel.
Description
The fastener serves the functions of both a lock washer and a ...
*
Swage nut
A swage nut or self-clinching nut is a type of nut or threaded insert that is used on sheet metal.
It permanently anchors itself to the sheet metal by swaging the surrounding material. Generally, the swage nut is made of a hard metal such as ...
References
Notes
Bibliography
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{{Nuts (hardware)
Nuts (hardware)