D-ring

D Ring

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D-ring

A D-ring is an item of hardware

Hardware

Hardware is a general term that refers to the physical cultural artifacts of a technology. It may also mean the physical components of a computer system, in the form of computer hardware....
, usually a metal ring shaped like the letter D

D is the fourth letter in the Latin alphabet. Its name in English language is spelled dee , plural dees....
. It may be used at the end of a leather or fabric strap, or may be secured to a surface with a metal or fabric strap. Applications of D-rings include:

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Encyclopedia

A D-ring is an item of hardware

Hardware

For light loading applications such as clothing and luggage
Luggage

Luggage is any number of bags, cases and containers which hold a traveller's articles during transport. The modern tourist can be expected to have packages containing clothing, toiletries, small possessions, trip necessities, and on the return-trip, souvenirs....
, D-rings made of plastics such as nylon
Nylon

Nylon is a generic designation for a family of synthetic polymers known generically as polyamides and first produced on February 28, 1935 by Wallace Carothers at DuPont....
may be used, as they weigh less and are impervious to rusting
Rust

Rust is a general term for a series of iron oxides, usually red oxides, formed by the reaction of iron and oxygen in the presence of water or air moisture....
.
Commonly, at the end of a tow-rope or chain, to allow one to create a bow around an item or part of an item that is being towed by a vehicle. They are commonly used with a chain to tether a boat
Boat

A boat is a watercraft of modest size designed to float or plane on water, and provide transport over it. Usually this water will be inland or in protected coastal areas....
to a dock
Dock (maritime)

A dock is a man-made feature involved in the handling of boats or ships. However the exact meaning varies between different variants of the English language....
or tree
TREE

TREE was a Boston hardcore punk band formed in the summer of 1990. They were active in the Boston music scene until disbanding in 2002....
when it is being moored.
In theatre
Theatre

Theatre is the branch of the performing arts defined by Bernard Beckerman as what "occurs when one or more actor, isolated in time and/or Theater , present themselves to Audience." By this broad definition, theatre has existed since the dawn of man, as a result of human tendency for story telling....
s, commonly used where a piece of scenery has to be lifted or "flown". D-rings are attached to the tops or bottoms of flats
Flats (theatre)

Flats, short for Scenery Flats, are flat pieces of theatre scenery which are painted and positioned on stage so as to give the appearance of buildings or other background....
with a "drift line" and turnbuckle attached to adjust the 'trim'.
A D-ring on an M16
M16 rifle

M16 is the Military of the United States designation for a family of rifles derived from the ArmaLite AR-15 and further developed by Colt's Manufacturing Company starting in the mid-20th century....
or variant type rifle is used to increase the pressure on the extractor and reduce malfunctions. This D-ring is a rubber grommet
Grommet

Grommets and eyelets are metal, plastic, or rubber rings that are inserted into a hole made through another material. They may be used to reinforce the hole, to shield something from the sharp edges of the hole, or both....
shaped like a "D" and fits over the extractor spring adding tension to it.
On breathing set
Breathing set

*Scuba set, used underwater*Rebreather, reprocesses exhaled air*Surface supplied diving, fed from the surface*Self-contained breathing apparatus, used out of water, worn by rescue workers, firefighters, and others...
s and scuba divers' stab jackets, to hang kit from, as in this image
A bit ring
Bit ring

The bit ring is the ring on the side of a horse's bit , particularly on a snaffle bit. It is used as a point of attachment for the cheekpieces of the bridle and for the reins....
used on the bit of a horse.
A type of carabiner
Carabiner

A carabiner or karabiner is a metal loop with a sprung or screwed gate. The loop part opposite the gate is referred to as the spine. It can quickly and reversibly connect components in safety-critical systems....
.
A part of a saddle
Saddle

A saddle is a supportive structure for a rider or other load, fastened to an animal's back by a girth . The most common type is the equestrian saddle designed for a horse, but specialized saddles have been created for camels and other creatures....
.

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