Inserts are
pin
A pin is a device used for fastening objects or material together.
Pin or PIN may also refer to:
Computers and technology
* Personal identification number (PIN), to access a secured system
** PIN pad, a PIN entry device
* PIN, a former Dutch ...
s, bolts,
screw
A screw and a bolt (see '' Differentiation between bolt and screw'' below) are similar types of fastener typically made of metal and characterized by a helical ridge, called a ''male thread'' (external thread). Screws and bolts are used to fa ...
s,
joints
A joint or articulation (or articular surface) is the connection made between bones, ossicles, or other hard structures in the body which link an animal's skeletal system into a functional whole.Saladin, Ken. Anatomy & Physiology. 7th ed. McGraw- ...
and other structures that are used to transfer localized
loads to a
composite
Composite or compositing may refer to:
Materials
* Composite material, a material that is made from several different substances
** Metal matrix composite, composed of metal and other parts
** Cermet, a composite of ceramic and metallic materials
...
panel or to join two composite panels together. Metallic inserts are commonly used in the
aerospace
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 astrona ...
and
marine
Marine is an adjective meaning of or pertaining to the sea or ocean.
Marine or marines may refer to:
Ocean
* Maritime (disambiguation)
* Marine art
* Marine biology
* Marine debris
* Marine habitats
* Marine life
* Marine pollution
Military
* ...
industries to attach objects to
sandwich composite panels.
Here is some history as referenced in the forward of ASME B18.29.1. Helical coil screw thread inserts have been in use for many years. It was first invented in the 1930s and found initial acceptance in aircraft manufactured and serviced by the Allied Air Forces during World War II. Since that time, applications for helical coil inserts have come into broad usage in aerospace, automotive and industrial equipment. Usage originally included metric spark plus sizes that were delineated in Europe in the 1950s coming into inch using countries in the 1960s. ASME Subcommittee 29 of the B18 Committee put together the first version of a standard in 1993. In 2010, ANSI approved of recent revisions and ASME published a revision of B18.29.1 - Helical Coil Screw Thread Inserts - Free Running and Screw Locking (Inch Series).
Some kinds of
knurled nut
Knurling is a manufacturing process, typically conducted on a lathe, whereby a pattern of straight, angled or crossed lines is rolled into the material.
Etymology
The terms ''knurl'' and ''knurled'' are from an earlier ''knur'' ‘knot in woo ...
are designed as inserts between metal bolts and soft plastic.
T-nut
A T-nut, T nut, or tee nut (also known as a blind nut, which can however also refer to a rivet nut
A rivet nut, also known as a blind rivet nut, or rivnut, is a one-piece internally threaded and counterbored tubular rivet that can be anchore ...
s,
insert nut An insert nut provides a threaded socket for a wooden workpiece, similar to a wall anchor. Insert nuts are inserted into a pre-drilled hole by one of two means: screw in and hammer in. In both cases, the external protrusions bite into the wood, prev ...
s, and
barrel bolts are often used in
ready-to-assemble furniture
Ready-to-assemble furniture (RTA), also known as knock-down furniture (KD), flat pack furniture, or kit furniture, is a form of furniture that requires customer assembly. The separate components are packed for sale in cartons which also contain ...
as inserts between metal bolts and wood.
References
{{Reflist
Composite materials